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Tap water quality report

Benicia, CA

EPA monitoring detected 19 contaminants across the 1 water supplier serving Benicia. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
27,131
people served
19
contaminants found
California rankings Lead in California PFAS in California

What was found in Benicia's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate-Nitrite
985650 µg/L 9857%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
Main supplier: CITY OF BENICIA · 27,131 people · 2019
1/1 SYR4
Nitrate
4294 µg/L 43%
of the EPA limit 10000 µg/L
Main supplier: CITY OF BENICIA · 27,131 people · 2019
1/1 SYR4
Fluoride
900 µg/L 23%
of the EPA limit 4000 µg/L
Main supplier: CITY OF BENICIA · 27,131 people · 2019
1/1 SYR4
Chromium
92.115 µg/L 92%
of the EPA limit 100 µg/L
Main supplier: CITY OF BENICIA · 27,131 people · 2019
1/1 SYR4
Copper
74 µg/L 5.7%
of the EPA limit 1300 µg/L
Main supplier: CITY OF BENICIA · 27,131 people · 2019
1/1 SYR4
Lead
47.8 µg/L 319%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: CITY OF BENICIA · 27,131 people · 2019
1/1 SYR4
TTHM
36 µg/L 45%
of the EPA limit 80 µg/L
Main supplier: CITY OF BENICIA · 27,131 people · 2014
1/1 SYR4
Chloroform
23 µg/L
No EPA limit set
Main supplier: CITY OF BENICIA · 27,131 people · 2014
1/1 SYR4
Bromodichloromethane
9.7 µg/L
No EPA limit set
Main supplier: CITY OF BENICIA · 27,131 people · 2014
1/1 SYR4
Arsenic
6.665 µg/L 67%
of the EPA limit 10 µg/L
Main supplier: CITY OF BENICIA · 27,131 people · 2019
1/1 SYR4
Gross Beta Particle Activity
5.21 pCi/L
No EPA limit set
Main supplier: CITY OF BENICIA · 27,131 people · 2018
1/1 SYR4
Di(2-ethylhexyl) Phthalate
3.8 µg/L 63%
of the EPA limit 6 µg/L
Main supplier: CITY OF BENICIA · 27,131 people · 2019
1/1 SYR4
Dibromochloromethane
3.2 µg/L
No EPA limit set
Main supplier: CITY OF BENICIA · 27,131 people · 2014
1/1 SYR4
Combined Uranium
2.40858 µg/L 8%
of the EPA limit 30 µg/L
Main supplier: CITY OF BENICIA · 27,131 people · 2019
1/1 SYR4
Cadmium
2.245 µg/L 45%
of the EPA limit 5 µg/L
Main supplier: CITY OF BENICIA · 27,131 people · 2019
1/1 SYR4
Pfba
0.0063 µg/L
No EPA limit set
Main supplier: CITY OF BENICIA · 27,131 people · 2025
1/1 UCMR-5
Pfhxa
0.0034 µg/L
No EPA limit set
Main supplier: CITY OF BENICIA · 27,131 people · 2025
1/1 UCMR-5
PFBS
0.0033 µg/L
No EPA limit set
Main supplier: CITY OF BENICIA · 27,131 people · 2025
1/1 UCMR-5
Lead
0.0023 mg/L 15%
of the EPA limit 0.0150 mg/L
Main supplier: CITY OF BENICIA · 27,131 people · 2024
1/1 LCR
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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Benicia

SupplierPopulation served
CITY OF BENICIA 27,131

Frequently asked questions about Benicia tap water

Is Benicia tap water safe to drink?

EPA testing detected 19 contaminants in the water serving Benicia. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Benicia?

1 public water supplier report drinking-water monitoring for Benicia, California to the EPA. Each is listed above with its population served.

What contaminants are in Benicia's water?

The contaminants EPA monitoring detected in Benicia include Nitrate-Nitrite, Nitrate, Fluoride, Chromium, Copper. The full list, with the level at the main supplier and the data source, is in the table above.

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.