Name: US Water Quality Contaminant Standards
License: https://creativecommons.org/licenses/by/4.0/

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Contains 201 records / 15 fields
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Data sourced from: https://github.com/artakulov/us-water-quality-data

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Showing 201 of 201

Pwsid	System Name	State	Contaminant	Contaminant Id	Measured	Measured Raw	Measured Unit	Federal Mcl	State Mcl	Unit	Passes Federal	Fails State	Notes	Zip Code Count
CA4510005	City of Redding Water Utility	CA	Manganese	manganese	128000	128	ppm		50	ppb	true	true	CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	5
CA4510005	City of Redding Water Utility	CA	Manganese (UCMR4)	manganese	110000	110	ppm		50	ppb	true	true	CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	5
CA3610041	Fontana Water Company	CA	1,2,3-Trichloropropane	123tcp	690	0.69	ppb		5	ppt	true	true	CA MCL 5 ppt (0.005 ppb). No federal MCL.	5
CA3310037	City of Corona	CA	Manganese	manganese	500	500	ppb		50	ppb	true	true	CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	7
CA3010001	City of Anaheim Public Utilities	CA	Manganese	manganese	437	437	ppb		50	ppb	true	true	CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	17
CA3310037	City of Corona	CA	1,2,3-Trichloropropane (1,2,3-TCP)	123tcp	19	0.019	ppb		5	ppt	true	true	CA MCL 5 ppt (0.005 ppb). No federal MCL.	7
CA4810008	City of Vacaville	CA	Hexavalent Chromium	chromium6	30	30	ppb		10	ppb	true	true	CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	4
CA1910043	Glendale Water & Power	CA	Manganese	manganese	120	120	ppb		50	ppb	true	true	CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	14
CA3310001	Coachella Valley Water District (CVWD)	CA	Chromium-6	chromium6	23	23	μg/L		10	ppb	true	true	CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	4
CA5010010	Modesto System (Includes Empire)	CA	Manganese	manganese	110	110	ppb		50	ppb	true	true	CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	10
CA0710003	Contra Costa Water District	CA	Manganese	manganese	101	101	μg/L		50	ppb	true	true	CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	8
CA1010007	City of Fresno	CA	Manganese	manganese	92	92	ug/L		50	ppb	true	true	CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	58
CA1010007	City of Fresno	CA	Manganese (Secondary)	manganese	92	92	ug/L		50	ppb	true	true	CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	58
CA3310037	City of Corona	CA	Perchlorate	perchlorate	9.4	9.4	ppb		6	ppb	true	true	CA MCL 6 ppb. No federal MCL.	7
CA0110001	Alameda County Water District	CA	Manganese	manganese	72	72	ppb		50	ppb	true	true	CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	5
CA4210004	Goleta Water District	CA	Manganese	manganese	70	70	ppb		50	ppb	true	true	CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	4
CA4110013	Daly City Water Quality	CA	Fluoride	fluoride	2.6	2.6	ppm	4	2	ppm	true	true	CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA4310012	City of Santa Clara	CA	Fluoride	fluoride	2.6	2.6	ppm	4	2	ppm	true	true	CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	7
CA1910102	Palmdale Water District	CA	Chromium (Hexavalent)	chromium6	12	12	μg/L		10	ppb	true	true	CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	6
CA3610052	City of Victorville Water District	CA	Chromium 6	chromium6	12	12	ppb		10	ppb	true	true	CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	4
CA5010010	Modesto System (Includes Empire)	CA	1,2,3-Trichloropropane	123tcp	5.9	5.9	ppt		5	ppt	true	true	CA MCL 5 ppt (0.005 ppb). No federal MCL.	10
CA1010007	City of Fresno	CA	1,2,3-Trichloropropane (TCP)	123tcp	5.2	5.2	ng/L		5	ppt	true	true	CA MCL 5 ppt (0.005 ppb). No federal MCL.	58
CA3010053	City of Huntington Beach	CA	Manganese	manganese	50	50	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	6
CA1510031	City of Bakersfield's Domestic Water System	CA	Manganese	manganese	45	45	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	24
CA1910124	Pasadena Water and Power (PWP)	CA	Hexavalent Chromium	chromium6	8.6	8.6	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	26
CA3310037	City of Corona	CA	Fluoride	fluoride	1.7	1.7	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	7
CA1010003	City of Clovis Water Division	CA	Manganese	manganese	42	42	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	4
CA1910126	City of Pomona	CA	Perchlorate	perchlorate	5	5	ppb		6	ppb	true		CA MCL 6 ppb. No federal MCL.	5
CA3310001	Coachella Valley Water District (CVWD)	CA	Perchlorate	perchlorate	4.7	4.7	μg/L		6	ppb	true		CA MCL 6 ppb. No federal MCL.	4
CA1010003	City of Clovis Water Division	CA	1,2,3-Trichloropropane [1,2,3-TCP]	123tcp	3.8	3.8	ppt		5	ppt	true		CA MCL 5 ppt (0.005 ppb). No federal MCL.	4
CA3410020	City of Sacramento	CA	Chromium, hexavalent	chromium6	7.6	7.6	μg/L		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	102
CA3310012	Elsinore Valley Municipal Water District (EVMWD)	CA	Manganese	manganese	37	37	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	3
CT0930011	South Central Connecticut Regional Water Authority	CT	PFOS	pfas_action	1.4	1.4	ppt	4	2	ppt	true		CT action level 2 ppt (non-enforceable). Proposed SB 733 would set MCL at 20 ppt.	26
CA1910043	Glendale Water & Power	CA	Chromium VI	chromium6	6.5	6.5	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	14
CA3610018	Cucamonga Valley Water District	CA	Perchlorate (Low Level)	perchlorate	3.7	3.7	ppb		6	ppb	true		CA MCL 6 ppb. No federal MCL.	5
CA3610041	Fontana Water Company	CA	Perchlorate	perchlorate	3.7	3.7	ppb		6	ppb	true		CA MCL 6 ppb. No federal MCL.	5
CA3610052	City of Victorville Water District	CA	Fluoride	fluoride	1.2	1.2	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA3010004	Mesa Water District	CA	Manganese	manganese	28.4	28.4	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	3
CA1910179	Burbank Water and Power (BWP)	CA	Hexavalent Chromium	chromium6	5.5	5.5	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	13
CA3010038	City of Santa Ana	CA	Perchlorate	perchlorate	3.3	3.3	ppb		6	ppb	true		CA MCL 6 ppb. No federal MCL.	12
CA1910070	Los Angeles County Waterworks Districts - Waterworks District No. 40, Antelope Valley, Regions 4 & 34	CA	Manganese	manganese	27	27	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	7
CA1910124	Pasadena Water and Power (PWP)	CA	Perchlorate	perchlorate	3.1	3.1	ppb		6	ppb	true		CA MCL 6 ppb. No federal MCL.	26
CA1910126	City of Pomona	CA	Chromium VI	chromium6	5.1	5.1	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	5
CA4810008	City of Vacaville	CA	Fluoride	fluoride	0.97	0.97	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA3310009	Eastern Municipal Water District	CA	Manganese	manganese	24	24	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	4
CA3010001	City of Anaheim Public Utilities	CA	Perchlorate	perchlorate	2.8	2.8	ppb		6	ppb	true		CA MCL 6 ppb. No federal MCL.	17
CA0110001	Alameda County Water District	CA	Fluoride (treated water)	fluoride	0.91	0.91	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	5
CA3310001	Coachella Valley Water District (CVWD)	CA	Fluoride	fluoride	0.9	0.9	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA3710025	Sweetwater Authority	CA	Fluoride	fluoride	0.9	0.9	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	8
CA3910011	City of Tracy	CA	Manganese	manganese	22	22	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	5
CA3310012	Elsinore Valley Municipal Water District (EVMWD)	CA	Perchlorate	perchlorate	2.5	2.5	ppb		6	ppb	true		CA MCL 6 ppb. No federal MCL.	3
CA0110005	East Bay Municipal Utility District	CA	Fluoride	fluoride	0.8	0.8	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	26
CA0710003	Contra Costa Water District	CA	Fluoride	fluoride	0.8	0.8	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	8
CA1910070	Los Angeles County Waterworks Districts - Waterworks District No. 40, Antelope Valley, Regions 4 & 34	CA	Fluoride	fluoride	0.8	0.8	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	7
CA1910124	Pasadena Water and Power (PWP)	CA	Fluoride	fluoride	0.8	0.8	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	26
CA1910179	Burbank Water and Power (BWP)	CA	Fluoride Treatment-related	fluoride	0.8	0.8	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	13
CA3010001	City of Anaheim Public Utilities	CA	Fluoride	fluoride	0.8	0.8	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	17
CA3010053	City of Huntington Beach	CA	Fluoride (treatment-related)	fluoride	0.8	0.8	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	6
CA3310009	Eastern Municipal Water District	CA	Fluoride	fluoride	0.8	0.8	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA3310038	Rancho California Water District	CA	Fluoride	fluoride	0.8	0.8	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	5
CA3310038	Rancho California Water District	CA	Manganese	manganese	20	20	μg/L		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	5
CA3710010	Helix Water District	CA	Fluoride	fluoride	0.8	0.8	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA3710020	City of San Diego	CA	Fluoride (treatment-related)	fluoride	0.8	0.8	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	81
CA3710027	Vista Irrigation District	CA	Fluoride	fluoride	0.8	0.8	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA4310011	San Jose Water Main System	CA	Fluoride (treated)	fluoride	0.8	0.8	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	57
CA3310009	Eastern Municipal Water District	CA	Perchlorate	perchlorate	2.4	2.4	ppb		6	ppb	true		CA MCL 6 ppb. No federal MCL.	4
CA3010004	Mesa Water District	CA	Fluoride	fluoride	0.79	0.79	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	3
CA3610034	Ontario Municipal Utilities Company (City of Ontario)	CA	Hexavalent Chromium	chromium6	3.9	3.9	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	5
CA4310012	City of Santa Clara	CA	Hexavalent Chromium	chromium6	3.9	3.9	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	7
CA4810007	City of Vallejo Water System	CA	Fluoride	fluoride	0.77	0.77	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA1910065	Long Beach Utilities Department	CA	Fluoride	fluoride	0.76	0.76	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	27
CT0930011	South Central Connecticut Regional Water Authority	CT	PFOA	pfas_action	0.76	0.76	ppt	4	2	ppt	true		CT action level 2 ppt (non-enforceable). Proposed SB 733 would set MCL at 20 ppt.	26
CA3710006	City of Escondido	CA	Fluoride	fluoride	0.74	0.74	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	7
CA1910240	Santa Clarita Valley Water Agency (SCV Water) and Los Angeles County Waterworks District #36	CA	Perchlorate	perchlorate	2.2	2.2	ug/L		6	ppb	true		CA MCL 6 ppb. No federal MCL.	2
CA0110001	Alameda County Water District	CA	Fluoride (naturally-occurring)	fluoride	0.72	0.72	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	5
CA1910043	Glendale Water & Power	CA	Fluoride	fluoride	0.7	0.7	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	14
CA1910155	Southwest Water System	CA	Fluoride	fluoride	0.7	0.7	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	2
CA1910240	Santa Clarita Valley Water Agency (SCV Water) and Los Angeles County Waterworks District #36	CA	Fluoride	fluoride	0.7	0.7	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	2
CA3010003	City of Buena Park Water Department	CA	Fluoride (treatment-related)	fluoride	0.7	0.7	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA3010004	Mesa Water District	CA	Fluoride (Metropolitan)	fluoride	0.7	0.7	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	3
CA3010010	City of Fullerton Water System Management	CA	Fluoride	fluoride	0.7	0.7	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	8
CA3010027	City of Orange Water Division	CA	Fluoride	fluoride	0.7	0.7	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	11
CA3410020	City of Sacramento	CA	Fluoride in treated water	fluoride	0.7	0.7	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	102
CA3710002	Vallecitos Water District	CA	Fluoride	fluoride	0.7	0.7	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA3710005	Carlsbad Municipal Water District	CA	Fluoride	fluoride	0.7	0.7	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	6
CA3710014	City of Oceanside Water Utilities	CA	Fluoride Added	fluoride	0.7	0.7	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	7
CA3710034	Otay Water District	CA	Fluoride	fluoride	0.7	0.7	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA5610023	City of Simi Valley / Waterworks District No. 8	CA	Fluoride	fluoride	0.7	0.7	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	6
CA2410009	City of Merced	CA	Hexavalent Chromium	chromium6	3.3	3.3	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	5
CA3610039	City of San Bernardino Municipal Water Department	CA	Hexavalent Chromium	chromium6	3.3	3.3	μg/L		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	18
CA1010007	City of Fresno	CA	Hexavalent Chromium	chromium6	3.2	3.2	ug/L		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	58
CA4310011	San Jose Water Main System	CA	Chromium-6	chromium6	3.2	3.2	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	57
CA3110008	City of Roseville	CA	Fluoride - added	fluoride	0.63	0.63	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	3
CA3310037	City of Corona	CA	Hexavalent Chromium	chromium6	3.1	3.1	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	7
CA4310014	City of Sunnyvale	CA	Fluoride	fluoride	0.6	0.6	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	5
CA3310012	Elsinore Valley Municipal Water District (EVMWD)	CA	Fluoride	fluoride	0.56	0.56	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	3
CA3310020	Indio Water Authority	CA	Fluoride	fluoride	0.55	0.55	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	3
CA3010003	City of Buena Park Water Department	CA	Fluoride (naturally-occurring)	fluoride	0.52	0.52	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA1910179	Burbank Water and Power (BWP)	CA	Fluoride Naturally-occurring	fluoride	0.5	0.5	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	13
CA3610034	Ontario Municipal Utilities Company (City of Ontario)	CA	Perchlorate	perchlorate	1.5	1.5	ppb		6	ppb	true		CA MCL 6 ppb. No federal MCL.	5
CA5610017	City of San Buenaventura (Ventura Water)	CA	Fluoride	fluoride	0.5	0.5	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	8
CA3710020	City of San Diego	CA	Manganese	manganese	12.1	12.1	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	81
CA3310031	Riverside Public Utilities	CA	Fluoride	fluoride	0.47	0.47	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	17
CA4210004	Goleta Water District	CA	Fluoride	fluoride	0.46	0.46	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA3010038	City of Santa Ana	CA	Hexavalent Chromium	chromium6	2.3	2.3	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	12
CA3010062	City of Garden Grove Water Services Division	CA	Fluoride	fluoride	0.45	0.45	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	7
CA3110008	City of Roseville	CA	Fluoride - natural	fluoride	0.45	0.45	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	3
CA4210010	City of Santa Barbara	CA	Fluoride	fluoride	0.44	0.44	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	17
CA3010053	City of Huntington Beach	CA	Fluoride (naturally-occurring)	fluoride	0.42	0.42	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	6
CA3610018	Cucamonga Valley Water District	CA	Fluoride (F)	fluoride	0.42	0.42	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	5
CA3610039	City of San Bernardino Municipal Water Department	CA	Fluoride	fluoride	0.42	0.42	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	18
CA3410020	City of Sacramento	CA	Fluoride in source water	fluoride	0.4	0.4	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	102
CA3710025	Sweetwater Authority	CA	Manganese	manganese	10	10	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	8
CA3610041	Fontana Water Company	CA	Fluoride	fluoride	0.39	0.39	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	5
CA3710034	Otay Water District	CA	Manganese	manganese	9.2	9.2	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	4
CA3610039	City of San Bernardino Municipal Water Department	CA	Perchlorate	perchlorate	1.1	1.1	μg/L		6	ppb	true		CA MCL 6 ppb. No federal MCL.	18
CA3010001	City of Anaheim Public Utilities	CA	Chromium, Hexavalent	chromium6	1.8	1.8	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	17
CA3710014	City of Oceanside Water Utilities	CA	Manganese	manganese	9	9	μg/L		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	7
CA3110008	City of Roseville	CA	Manganese	manganese	8.6	8.6	ug/L		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	3
CA1910146	City of Santa Monica Water Resources Division	CA	Chromium 6	chromium6	1.7	1.7	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	11
CA1010007	City of Fresno	CA	Perchlorate	perchlorate	1	1	ug/L		6	ppb	true		CA MCL 6 ppb. No federal MCL.	58
CA5610017	City of San Buenaventura (Ventura Water)	CA	Manganese (Secondary MCL)	manganese	8.3	0.0083	ppm		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	8
CA1910034	City of Downey	CA	Fluoride	fluoride	0.31	0.31	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA0110006	City of Hayward	CA	Fluoride (source water)	fluoride	0.3	0.3	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	7
CA1510031	City of Bakersfield's Domestic Water System	CA	Hexavalent chromium	chromium6	1.5	1.5	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	24
CA3710020	City of San Diego	CA	Fluoride (naturally occurring)	fluoride	0.3	0.3	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	81
CA3310020	Indio Water Authority	CA	Chromium 6	chromium6	1.4	1.4	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	3
CA4910009	Santa Rosa Water	CA	Manganese	manganese	6.93	6.93	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	8
CA1910126	City of Pomona	CA	Fluoride	fluoride	0.26	0.26	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	5
CA1910240	Santa Clarita Valley Water Agency (SCV Water) and Los Angeles County Waterworks District #36	CA	Chromium, hexavalent (CrVI)	chromium6	1.3	1.3	ug/L		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	2
CA3010062	City of Garden Grove Water Services Division	CA	Chromium, Hexavalent	chromium6	1.3	1.3	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	7
CA3010010	City of Fullerton Water System Management	CA	Hexavalent Chromium	chromium6	1.2	1.2	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	8
CA3310012	Elsinore Valley Municipal Water District (EVMWD)	CA	Chromium-6	chromium6	1.2	1.2	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	3
CA4910009	Santa Rosa Water	CA	Fluoride	fluoride	0.22	0.22	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	8
CA1010003	City of Clovis Water Division	CA	Fluoride	fluoride	0.2	0.2	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA1910102	Palmdale Water District	CA	Fluoride (naturally occurring)	fluoride	0.2	0.2	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	6
CA4310011	San Jose Water Main System	CA	Manganese	manganese	5	5	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	57
CA4810008	City of Vacaville	CA	Manganese	manganese	5	5	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	4
CA3710006	City of Escondido	CA	Manganese	manganese	4.8	4.8	μg/L		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	7
CA4110013	Daly City Water Quality	CA	Manganese	manganese	4.6	4.6	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	4
CA4310012	City of Santa Clara	CA	Manganese	manganese	4.6	4.6	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	7
CA3610034	Ontario Municipal Utilities Company (City of Ontario)	CA	Fluoride (Naturally occurring)	fluoride	0.16	0.16	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	5
CA4210010	City of Santa Barbara	CA	Manganese	manganese	4	4	μg/L		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	17
CA4510005	City of Redding Water Utility	CA	Fluoride	fluoride	0.16	0.16	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	5
CA1010007	City of Fresno	CA	Fluoride	fluoride	0.14	0.14	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	58
CA3910011	City of Tracy	CA	Fluoride	fluoride	0.14	0.14	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	5
CA1910102	Palmdale Water District	CA	Manganese	manganese	3.4	3.4	μg/L		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	6
CA3610041	Fontana Water Company	CA	Hexavalent Chromium	chromium6	0.68	0.68	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	5
CA1510031	City of Bakersfield's Domestic Water System	CA	Fluoride	fluoride	0.13	0.13	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	24
CA5010010	Modesto System (Includes Empire)	CA	Fluoride	fluoride	0.13	0.13	ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	10
CA3010003	City of Buena Park Water Department	CA	Hexavalent Chromium	chromium6	0.61	0.61	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	4
CA3010062	City of Garden Grove Water Services Division	CA	Manganese	manganese	3	3	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	7
CA4410010	City of Santa Cruz Water Department	CA	Fluoride	fluoride	0.12	0.12	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	6
CA3710014	City of Oceanside Water Utilities	CA	Fluoride Natural	fluoride	0.116	0.116	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	7
CA2410009	City of Merced	CA	Fluoride	fluoride	0.11	0.11	mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	5
CA3010010	City of Fullerton Water System Management	CA	Manganese	manganese	2.7	2.7	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	8
CA1910065	Long Beach Utilities Department	CA	Manganese	manganese	2.5	2.5	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	27
CA1910039	San Gabriel Valley Water Company	CA	Manganese	manganese	2.18	2.18	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	4
CA3610034	Ontario Municipal Utilities Company (City of Ontario)	CA	Manganese	manganese	2	2	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	5
CA3710002	Vallecitos Water District	CA	Manganese	manganese	2	2	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	4
CA4810007	City of Vallejo Water System	CA	Manganese	manganese	1.9	1.9	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	4
CA4110013	Daly City Water Quality	CA	Chromium (VI)	chromium6	0.35	0.35	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	4
CA3310001	Coachella Valley Water District (CVWD)	CA	Manganese	manganese	1.6	1.6	μg/L		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	4
CA3710020	City of San Diego	CA	Chromium, hexavalent (CrVI)	chromium6	0.32	0.32	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	81
CA4310014	City of Sunnyvale	CA	Manganese	manganese	1.4	1.4	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	5
CA3410020	City of Sacramento	CA	Manganese	manganese	1.3	1.3	μg/L		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	102
CA0110006	City of Hayward	CA	Chromium (VI)	chromium6	0.25	0.25	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	7
CA4410010	City of Santa Cruz Water Department	CA	Manganese	manganese	1.2	1.2	μg/L		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	6
CA0110005	East Bay Municipal Utility District	CA	Hexavalent Chromium	chromium6	0.2	0.2	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	26
CA3710005	Carlsbad Municipal Water District	CA	Chromium VI	chromium6	0.18	0.18	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	6
CA3710010	Helix Water District	CA	Hexavalent Chromium	chromium6	0.18	0.18	µg/L		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	4
CA3710034	Otay Water District	CA	Chromium VI	chromium6	0.18	0.18	ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	4
CA4410010	City of Santa Cruz Water Department	CA	Hexavalent Chromium	chromium6	0.18	0.18	μg/L		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	6
CA4210010	City of Santa Barbara	CA	Manganese UCMR4	manganese	0.81	0.81	μg/L		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	17
CA3610041	Fontana Water Company	CA	Manganese	manganese	0.55	0.55	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	5
CA1910034	City of Downey	CA	Manganese (UCMR 4)	manganese	0.19	0.19	ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	4
CA1910039	San Gabriel Valley Water Company	CA	Fluoride	fluoride	0.00287	2.87	ppb	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	4
CA0110006	City of Hayward	CA	Manganese	manganese			ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	7
CA1010003	City of Clovis Water Division	CA	Hexavalent Chromium	chromium6			ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	4
CA1910034	City of Downey	CA	Manganese	manganese			ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	4
CA1910039	San Gabriel Valley Water Company	CA	Hexavalent Chromium	chromium6			ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	4
CA1910102	Palmdale Water District	CA	Perchlorate	perchlorate			μg/L		6	ppb	true		CA MCL 6 ppb. No federal MCL.	6
CA1910126	City of Pomona	CA	1,2,3-Trichloropropane (1,2,3-TCP)	123tcp			ppt		5	ppt	true		CA MCL 5 ppt (0.005 ppb). No federal MCL.	5
CA1910126	City of Pomona	CA	Manganese	manganese			ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	5
CA1910146	City of Santa Monica Water Resources Division	CA	1,2,3-Trichloropropane (TCP)	123tcp			ng/L		5	ppt	true		CA MCL 5 ppt (0.005 ppb). No federal MCL.	11
CA1910146	City of Santa Monica Water Resources Division	CA	Perchlorate	perchlorate			ppb		6	ppb	true		CA MCL 6 ppb. No federal MCL.	11
CA1910146	City of Santa Monica Water Resources Division	CA	Manganese	manganese			ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	11
CA1910155	Southwest Water System	CA	Manganese	manganese			μg/L		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	2
CA1910240	Santa Clarita Valley Water Agency (SCV Water) and Los Angeles County Waterworks District #36	CA	Manganese	manganese			ug/L		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	2
CA3010003	City of Buena Park Water Department	CA	Perchlorate	perchlorate			ppb		6	ppb	true		CA MCL 6 ppb. No federal MCL.	4
CA3010003	City of Buena Park Water Department	CA	Manganese	manganese			ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	4
CA3010010	City of Fullerton Water System Management	CA	Perchlorate	perchlorate			ppb		6	ppb	true		CA MCL 6 ppb. No federal MCL.	8
CA3010027	City of Orange Water Division	CA	Manganese	manganese			ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	11
CA3010062	City of Garden Grove Water Services Division	CA	Perchlorate	perchlorate			ppb		6	ppb	true		CA MCL 6 ppb. No federal MCL.	7
CA3110025	Placer County Water Agency (Foothill/Sunset Water System)	CA	Fluoride	fluoride			mg/L	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	3
CA3110025	Placer County Water Agency (Foothill/Sunset Water System)	CA	Manganese	manganese			mg/L		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	3
CA3310020	Indio Water Authority	CA	Perchlorate	perchlorate			ppb		6	ppb	true		CA MCL 6 ppb. No federal MCL.	3
CA3310020	Indio Water Authority	CA	Manganese	manganese			ppb		50	ppb	true		CA enforces secondary standard as primary. Federal 50 ppb is non-enforceable.	3
CA3310031	Riverside Public Utilities	CA	Perchlorate	perchlorate			ug/L		6	ppb	true		CA MCL 6 ppb. No federal MCL.	17
CA3710002	Vallecitos Water District	CA	Chromium VI	chromium6			ppb		10	ppb	true		CA adopted Cr-6 MCL of 10 ppb effective Oct 2024. No federal Cr-6 MCL.	4
CA4310011	San Jose Water Main System	CA	Fluoride (natural)	fluoride			ppm	4	2	ppm	true		CA primary MCL 2.0 mg/L vs federal primary 4.0 mg/L	57