Is Yucaipa Valley Water District Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: San Bernardino

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Unaddressed	2026-03-17
MCL	Health-based	Resolved	2024-07-01 → 2024-09-30
MCL	Health-based	Resolved	2024-07-01 → 2024-09-30
MCL	Health-based	Resolved	2023-04-01 → 2023-06-30
MCL	Health-based	Resolved	2023-04-01 → 2023-06-30
MCL	Health-based	Resolved	2019-07-01 → 2019-09-30
MCL	Health-based	Resolved	2019-07-01 → 2019-09-30
MCL	Health-based	Resolved	2019-07-01 → 2019-09-30
MCL	Health-based	Resolved	2019-07-01 → 2019-09-30
TT	Health-based	Resolved	1991-06-01 → 1991-06-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
Pfpea	0.0089 µg/L	5/31	2024
PFBS	0.0100 µg/L	2/31	2024
Pfhxa	0.0071 µg/L	2/31	2024
PFOA	0.0042 µg/L	1/31	2024

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	11000 µg/L 110% of the EPA limit, in the worst sample — 10000 µg/L	610/690	SYR4	2012–2019
Dibromochloromethane	38.8 µg/L No EPA limit set	104/105	SYR4	2013–2019
TTHM	100 µg/L 125% of the EPA limit, in the worst sample — 80 µg/L	104/105	SYR4	2013–2019
Bromodichloromethane	30.9 µg/L No EPA limit set	100/105	SYR4	2013–2019
Bromoform	46.9 µg/L No EPA limit set	98/105	SYR4	2013–2019
Dibromoacetic Acid	13.9 µg/L No EPA limit set	96/104	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	35.4 µg/L 59% of the EPA limit 60 µg/L	96/104	SYR4	2013–2019
Chloroform	43.2 µg/L No EPA limit set	90/105	SYR4	2013–2019
Dichloroacetic Acid	17.3 µg/L No EPA limit set	70/104	SYR4	2013–2019
Fluoride	1100 µg/L 28% of the EPA limit 4000 µg/L	60/65	SYR4	2012–2019
Trichloroacetic Acid	14.3 µg/L No EPA limit set	35/104	SYR4	2013–2019
Nitrate-Nitrite	800000 µg/L 8000% of the EPA limit, in the worst sample — 10000 µg/L	30/42	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	25/25	LCR	2023
Arsenic	11 µg/L 110% of the EPA limit, in the worst sample — 10 µg/L	15/67	SYR4	2012–2019
Monobromoacetic Acid	1.4 µg/L No EPA limit set	14/104	SYR4	2013–2019
Tetrachloroethylene	0.6000 µg/L 12% of the EPA limit 5 µg/L	5/77	SYR4	2012–2019
1,1-Dichloroethylene	1.2 µg/L 17% of the EPA limit 7 µg/L	4/76	SYR4	2012–2019
Barium	120 µg/L 6% of the EPA limit 2000 µg/L	4/64	SYR4	2012–2019
Copper	300 µg/L 23% of the EPA limit 1300 µg/L	4/64	SYR4	2012–2019
Combined Uranium	5.811 µg/L 19% of the EPA limit 30 µg/L	4/8	SYR4	2014–2017
1,1,1-Trichloroethane	0.6100 µg/L 0.3% of the EPA limit 200 µg/L	2/76	SYR4	2012–2019
Chromium	2.4 µg/L 2.4% of the EPA limit 100 µg/L	1/65	SYR4	2012–2019
Lead	8.2 µg/L 55% of the EPA limit 15 µg/L	1/58	SYR4	2012–2019
Monochloroacetic Acid	2.7 µg/L No EPA limit set	1/104	SYR4	2013–2019
Selenium	5.5 µg/L 11% of the EPA limit 50 µg/L	1/64	SYR4	2012–2019

82 contaminants tested, none detected

1,1,2-Trichloroethane1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: ZOBA, JOSEPH
Phone: 909-797-5119
Email: jzoba@yvwd.us

Frequently asked questions about Yucaipa Valley Water District

Is Yucaipa Valley Water District tap water safe to drink?

EPA monitoring detected 29 contaminants in Yucaipa Valley Water District's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Yucaipa Valley Water District's water?

EPA monitoring detected Nitrate, Dibromochloromethane, TTHM, Bromodichloromethane, Bromoform, and others. The full list with the level and data source for each is above.

How many people does Yucaipa Valley Water District serve?

Yucaipa Valley Water District reports serving 52,010 people in California, per its EPA record.

Has Yucaipa Valley Water District had any water quality violations?

The EPA has 19 violations on file for Yucaipa Valley Water District, of which 11 are health-based (a contaminant limit or required treatment was breached) and 1 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.