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Tap water quality report

City of Benicia

EPA monitoring tested this supplier for 106 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

106
contaminants tested
19
detected
27,131
people served
3
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Surface water
Ownership
Local government
Counties served
Solano

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.

3
health-based violations
5
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 1995-03-01 → 1995-03-31
TT Health-based Resolved 1995-03-01 → 1995-03-31
TT Health-based Resolved 1995-03-01 → 1995-03-31
MR Monitoring Resolved 1998-01-01 → 1998-01-31
MR Monitoring Resolved 1998-01-01 → 1998-01-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfba 0.0063 µg/L 1/4 2025
PFBS 0.0033 µg/L 1/4 2025
Pfhxa 0.0034 µg/L 1/4 2025

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
900 µg/L 23%
of the EPA limit 4000 µg/L
worst single sample: 970 µg/L
41/62 SYR4 2012–2019
Lead
0.0023 mg/L 15%
of the EPA limit 0.0150 mg/L
 37/37 LCR 2024
Arsenic
6.665 µg/L 67%
of the EPA limit 10 µg/L
worst single sample: 7.9 µg/L
30/41 SYR4 2012–2019
Nitrate
4294 µg/L 43%
of the EPA limit 10000 µg/L
 14/144 SYR4 2012–2019
Lead
47.8 µg/L 319%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 83 µg/L
11/44 SYR4 2012–2019
Chromium
92.115 µg/L 92%
of the EPA limit 100 µg/L
worst single sample: 103 µg/L
8/43 SYR4 2012–2019
Combined Uranium
2.40858 µg/L 8%
of the EPA limit 30 µg/L
worst single sample: 2.831 µg/L
8/24 SYR4 2012–2019
Gross Beta Particle Activity
5.21 pCi/L
No EPA limit set
 4/18 SYR4 2012–2018
Copper
74 µg/L 5.7%
of the EPA limit 1300 µg/L
worst single sample: 75 µg/L
2/45 SYR4 2012–2019
Cadmium
2.245 µg/L 45%
of the EPA limit 5 µg/L
worst single sample: 2.3 µg/L
2/41 SYR4 2012–2019
Nitrate-Nitrite
985650 µg/L 9857%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 1000000 µg/L
2/43 SYR4 2012–2019
Bromodichloromethane
9.7 µg/L
No EPA limit set
 1/1 SYR4 2014
Chloroform
23 µg/L
No EPA limit set
 1/1 SYR4 2014
Di(2-ethylhexyl) Phthalate
3.8 µg/L 63%
of the EPA limit 6 µg/L
 1/19 SYR4 2012–2019
Dibromochloromethane
3.2 µg/L
No EPA limit set
 1/1 SYR4 2014
TTHM
36 µg/L 45%
of the EPA limit 80 µg/L
 1/1 SYR4 2014
87 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, TotalAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
GARCIA, RAINIER
Phone
707-746-4393
Email
RGarcia@ci.benicia.ca.us

Frequently asked questions about City of Benicia

Is City of Benicia tap water safe to drink?

EPA monitoring detected 19 contaminants in City of Benicia'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 City of Benicia's water?

EPA monitoring detected Fluoride, Lead, Arsenic, Nitrate, Lead, and others. The full list with the level and data source for each is above.

How many people does City of Benicia serve?

City of Benicia reports serving 27,131 people in California, per its EPA record.

Has City of Benicia had any water quality violations?

The EPA has 5 violations on file for City of Benicia, of which 3 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.