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Tap water quality report

Livermore, CA

EPA monitoring detected 14 contaminants across the 2 water suppliers serving Livermore. 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.

2
water suppliers
38,932
people served
14
contaminants found
California rankings Lead in California PFAS in California

What was found in Livermore'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
190000 µg/L 1900%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
Highest in the city: ZONE 7 WATER AGENCY · 40 people · 2015
1/2 SYR4
Nitrate
4700.8 µg/L 47%
of the EPA limit 10000 µg/L
Highest in the city: ZONE 7 WATER AGENCY · 40 people · 2019
1/2 SYR4
Barium
320 µg/L 16%
of the EPA limit 2000 µg/L
Highest in the city: ZONE 7 WATER AGENCY · 40 people · 2019
1/2 SYR4
Fluoride
100 µg/L 2.5%
of the EPA limit 4000 µg/L
Highest in the city: ZONE 7 WATER AGENCY · 40 people · 2019
1/2 SYR4
TTHM
60.94 µg/L 76%
of the EPA limit 80 µg/L
Highest in the city: ZONE 7 WATER AGENCY · 40 people · 2018
1/2 SYR4
Dibromochloromethane
23.96 µg/L
No EPA limit set
Highest in the city: ZONE 7 WATER AGENCY · 40 people · 2019
1/2 SYR4
Chromium
20 µg/L 20%
of the EPA limit 100 µg/L
Highest in the city: ZONE 7 WATER AGENCY · 40 people · 2019
1/2 SYR4
Bromodichloromethane
19.905 µg/L
No EPA limit set
Highest in the city: ZONE 7 WATER AGENCY · 40 people · 2019
1/2 SYR4
Bromoform
17.085 µg/L
No EPA limit set
Highest in the city: ZONE 7 WATER AGENCY · 40 people · 2019
1/2 SYR4
Chloroform
15.325 µg/L
No EPA limit set
Highest in the city: ZONE 7 WATER AGENCY · 40 people · 2019
1/2 SYR4
Selenium
13 µg/L 26%
of the EPA limit 50 µg/L
Highest in the city: ZONE 7 WATER AGENCY · 40 people · 2019
1/2 SYR4
Arsenic
5.54 µg/L 55%
of the EPA limit 10 µg/L
Highest in the city: ZONE 7 WATER AGENCY · 40 people · 2019
1/2 SYR4
Combined Uranium
5.0847 µg/L 17%
of the EPA limit 30 µg/L
Highest in the city: ZONE 7 WATER AGENCY · 40 people · 2019
1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: CITY OF LIVERMORE · 38,892 people · 2025
Highest in the city: 0.0067 mg/L — ZONE 7 WATER AGENCY · 40 people · 2021
2/2 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 Livermore

SupplierPopulation served
CITY OF LIVERMORE 38,892
ZONE 7 WATER AGENCY 40

Frequently asked questions about Livermore tap water

Is Livermore tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Livermore. 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 Livermore?

2 public water suppliers report drinking-water monitoring for Livermore, California to the EPA. Each is listed above with its population served.

What contaminants are in Livermore's water?

The contaminants EPA monitoring detected in Livermore include Nitrate-Nitrite, Nitrate, Barium, Fluoride, TTHM. 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.