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Tap water quality report

Serrano Water District

EPA monitoring tested this supplier for 112 contaminants and detected 22. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

112
contaminants tested
22
detected
5,659
people served
2
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Local government
Counties served
Orange

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.

2
health-based violations
3
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2004-01-01 → 2004-03-31
TT Health-based Resolved 2004-01-01 → 2004-03-31
MR Monitoring Resolved 2004-01-01 → 2004-03-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfpea 0.0161 µg/L 5/6 2024
Pfba 0.0111 µg/L 2/6 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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Fluoride
420 µg/L 11%
of the EPA limit 4000 µg/L
worst single sample: 450 µg/L
164/164 SYR4 2012–2019
Nitrate
4355.02 µg/L 44%
of the EPA limit 10000 µg/L
worst single sample: 5012.68 µg/L
84/364 SYR4 2012–2019
Dichloroacetic Acid
11.775 µg/L
No EPA limit set
worst single sample: 17.1 µg/L
60/60 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
27.62 µg/L 46%
of the EPA limit 60 µg/L
worst single sample: 37.2 µg/L
60/60 SYR4 2012–2019
Bromodichloromethane
19.925 µg/L
No EPA limit set
worst single sample: 25.9 µg/L
58/63 SYR4 2012–2019
TTHM
60.96 µg/L 76%
of the EPA limit 80 µg/L
worst single sample: 92.2 µg/L
58/63 SYR4 2012–2019
Dibromochloromethane
12.87 µg/L
No EPA limit set
worst single sample: 16.7 µg/L
55/63 SYR4 2012–2019
Chloroform
32.82 µg/L
No EPA limit set
worst single sample: 53.1 µg/L
53/63 SYR4 2012–2019
Dibromoacetic Acid
3.19 µg/L
No EPA limit set
worst single sample: 3.8 µg/L
28/60 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 22/22 LCR 2023
Bromoform
3.9 µg/L
No EPA limit set
worst single sample: 4.5 µg/L
21/63 SYR4 2012–2019
Nitrate-Nitrite
724000 µg/L 7240%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 850000 µg/L
19/25 SYR4 2012–2019
Trichloroacetic Acid
18.16 µg/L
No EPA limit set
worst single sample: 20.5 µg/L
19/60 SYR4 2012–2019
Bromate
9.355 µg/L 94%
of the EPA limit 10 µg/L
worst single sample: 9.6 µg/L
8/74 SYR4 2013–2019
Combined Uranium
3.427 µg/L 11%
of the EPA limit 30 µg/L
worst single sample: 3.725 µg/L
6/6 SYR4 2012–2019
Lithium
27.1 µg/L
No EPA limit set
 6/6 UCMR-5 2024
Barium
137 µg/L 6.9%
of the EPA limit 2000 µg/L
worst single sample: 140 µg/L
4/18 SYR4 2012–2019
Dalapon
12 µg/L 6%
of the EPA limit 200 µg/L
 1/5 SYR4 2014–2018
Monobromoacetic Acid
1.5 µg/L
No EPA limit set
 1/60 SYR4 2012–2019
Monochloroacetic Acid
2.4 µg/L
No EPA limit set
 1/60 SYR4 2012–2019
90 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-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, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
VILANDER, JERRY
Phone
714-538-0079
Email
[email protected]

Frequently asked questions about Serrano Water District

Is Serrano Water District tap water safe to drink?

EPA monitoring detected 22 contaminants in Serrano 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 Serrano Water District's water?

EPA monitoring detected Fluoride, Nitrate, Dichloroacetic Acid, Total Haloacetic Acids (HAA5), Bromodichloromethane, and others. The full list with the level and data source for each is above.

How many people does Serrano Water District serve?

Serrano Water District reports serving 5,659 people in California, per its EPA record.

Has Serrano Water District had any water quality violations?

The EPA has 3 violations on file for Serrano Water District, of which 2 are health-based (a contaminant limit or required treatment was breached) and 0 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.