Compliance record
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
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.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 8967.2 µg/L 90% of the EPA limit 10000 µg/L
worst single sample: 16850 µg/L | 3840/3846 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 6.322 µg/L 126% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 7.9 µg/L | 218/525 | SYR4 | 2012–2019 |
| TTHM | 38.5 µg/L 48% of the EPA limit 80 µg/L
worst single sample: 42.8 µg/L | 120/438 | SYR4 | 2012–2019 |
| Bromodichloromethane | 14.098 µg/L No EPA limit set
worst single sample: 15.46 µg/L | 113/438 | SYR4 | 2012–2019 |
| Dibromochloromethane | 13.898 µg/L No EPA limit set
worst single sample: 15.44 µg/L | 113/438 | SYR4 | 2012–2019 |
| Chloroform | 13.67 µg/L No EPA limit set
worst single sample: 15.51 µg/L | 111/438 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 18 µg/L 30% of the EPA limit 60 µg/L
worst single sample: 19 µg/L | 104/116 | SYR4 | 2016–2019 |
| Dichloroacetic Acid | 9.5 µg/L No EPA limit set
worst single sample: 12 µg/L | 101/116 | SYR4 | 2016–2019 |
| Trichloroacetic Acid | 6.07 µg/L No EPA limit set
worst single sample: 6.9 µg/L | 94/116 | SYR4 | 2016–2019 |
| Dibromoacetic Acid | 5.855 µg/L No EPA limit set
worst single sample: 6.1 µg/L | 90/116 | SYR4 | 2016–2019 |
| Bromoform | 11.837 µg/L No EPA limit set
worst single sample: 13.35 µg/L | 87/438 | SYR4 | 2012–2019 |
| Chromium | 17.4951 µg/L 17% of the EPA limit 100 µg/L
worst single sample: 24.942 µg/L | 63/88 | SYR4 | 2012–2019 |
| Lead | 0.0075 mg/L 50% of the EPA limit 0.0150 mg/L | 22/22 | LCR | 2024 |
| Barium | 340 µg/L 17% of the EPA limit 2000 µg/L
worst single sample: 370 µg/L | 21/21 | SYR4 | 2012–2019 |
| Fluoride | 173.5 µg/L 4.3% of the EPA limit 4000 µg/L
worst single sample: 180 µg/L | 14/21 | SYR4 | 2012–2019 |
| Copper | 56.688 µg/L 4.4% of the EPA limit 1300 µg/L
worst single sample: 91 µg/L | 11/40 | SYR4 | 2012–2019 |
| Lithium | 25.1 µg/L No EPA limit set | 11/24 | UCMR-5 | 2024 |
| Antimony, Total | 0.0634 µg/L 1.1% of the EPA limit 6 µg/L
worst single sample: 0.0650 µg/L | 9/30 | SYR4 | 2012–2019 |
| Arsenic | 1.3638 µg/L 14% of the EPA limit 10 µg/L
worst single sample: 1.517 µg/L | 9/30 | SYR4 | 2012–2019 |
| Combined Uranium | 1.06922 µg/L 3.6% of the EPA limit 30 µg/L
worst single sample: 1.1473 µg/L | 9/15 | SYR4 | 2014–2019 |
| Lead | 0.7154 µg/L 4.8% of the EPA limit 15 µg/L
worst single sample: 0.9950 µg/L | 9/30 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 10190 µg/L 102% of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 11000 µg/L | 7/7 | SYR4 | 2017–2019 |
| Selenium | 1.0466 µg/L 2.1% of the EPA limit 50 µg/L
worst single sample: 1.187 µg/L | 7/28 | SYR4 | 2012–2019 |
| Cadmium | 0.0127 µg/L 0.3% of the EPA limit 5 µg/L
worst single sample: 0.0130 µg/L | 4/28 | SYR4 | 2012–2019 |
| Beryllium, Total | 0.0040 µg/L 0.1% of the EPA limit 4 µg/L | 1/22 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 2.62 pCi/L No EPA limit set | 1/1 | SYR4 | 2019 |
| Monobromoacetic Acid | 1.1 µg/L No EPA limit set | 1/116 | SYR4 | 2016–2019 |
| Monochloroacetic Acid | 2.4 µg/L No EPA limit set | 1/116 | SYR4 | 2016–2019 |
79 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-PF3ONSAdonaAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBromateChlorobenzeneCyanideCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about California Water Service - Livermore
Is California Water Service - Livermore tap water safe to drink?
EPA monitoring detected 34 contaminants in California Water Service - Livermore'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 California Water Service - Livermore's water?
EPA monitoring detected Nitrate, Tetrachloroethylene, TTHM, Bromodichloromethane, Dibromochloromethane, and others. The full list with the level and data source for each is above.
How many people does California Water Service - Livermore serve?
California Water Service - Livermore reports serving 60,414 people in California, per its EPA record.
Has California Water Service - Livermore had any water quality violations?
The EPA has no formal drinking-water violations on file for California Water Service - Livermore.
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.