What was found in Anaheim'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.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 5400 µg/L 54% of the EPA limit 10000 µg/L Main supplier: CITY OF ANAHEIM · 348,593 people · 2019
Highest in the city: 619000 µg/L — HYNES ESTATES MUTUAL WATER CO. · 168 people · 2019 | 5/5 | SYR4 |
| Nitrate | 5330 µg/L 53% of the EPA limit 10000 µg/L Main supplier: CITY OF ANAHEIM · 348,593 people · 2019
Highest in the city: 7297 µg/L — GOLDEN STATE WC - PLACENTIA/YORBA LINDA · 50,381 people · 2019 | 5/5 | SYR4 |
| Fluoride | 550.5 µg/L 14% of the EPA limit 4000 µg/L Main supplier: CITY OF ANAHEIM · 348,593 people · 2019
Highest in the city: 610.5 µg/L — GOLDEN STATE WC - PLACENTIA/YORBA LINDA · 50,381 people · 2019 | 5/5 | SYR4 |
| Barium | 120 µg/L 6% of the EPA limit 2000 µg/L Main supplier: CITY OF ANAHEIM · 348,593 people · 2019
Highest in the city: 127.45 µg/L — GOLDEN STATE WC - COWAN HEIGHTS · 6,997 people · 2018 | 4/5 | SYR4 |
| TTHM | 75 µg/L 94% of the EPA limit 80 µg/L Main supplier: CITY OF ANAHEIM · 348,593 people · 2019 | 4/5 | SYR4 |
| Lithium | 61 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2025 | 4/5 | UCMR-5 |
| Chloroform | 33 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2019 | 4/5 | SYR4 |
| Combined Uranium | 16.3751 µg/L 55% of the EPA limit 30 µg/L Main supplier: CITY OF ANAHEIM · 348,593 people · 2019
Highest in the city: 25.2108 µg/L — HYNES ESTATES MUTUAL WATER CO. · 168 people · 2019 | 5/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 17 µg/L 28% of the EPA limit 60 µg/L Main supplier: CITY OF ANAHEIM · 348,593 people · 2019
Highest in the city: 24 µg/L — GOLDEN STATE WC - COWAN HEIGHTS · 6,997 people · 2019 | 4/5 | SYR4 |
| Bromodichloromethane | 23 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2019 | 4/5 | SYR4 |
| Dibromochloromethane | 17 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2019
Highest in the city: 18.85 µg/L — GOLDEN STATE WC - COWAN HEIGHTS · 6,997 people · 2019 | 4/5 | SYR4 |
| Dichloroacetic Acid | 8.925 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2019
Highest in the city: 11 µg/L — GOLDEN STATE WC - COWAN HEIGHTS · 6,997 people · 2019 | 4/5 | SYR4 |
| Bromoform | 6.915 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2019
Highest in the city: 8.8 µg/L — GOLDEN STATE WC - COWAN HEIGHTS · 6,997 people · 2019 | 4/5 | SYR4 |
| Selenium | 7.57 µg/L 15% of the EPA limit 50 µg/L Highest in the city: GOLDEN STATE WC - PLACENTIA/YORBA LINDA · 50,381 people · 2019 | 3/5 | SYR4 |
| Trichloroacetic Acid | 7.2 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2019
Highest in the city: 7.25 µg/L — GOLDEN STATE WC - COWAN HEIGHTS · 6,997 people · 2019 | 4/5 | SYR4 |
| Monochloroacetic Acid | 5.925 µg/L No EPA limit set Highest in the city: GOLDEN STATE WC - PLACENTIA/YORBA LINDA · 50,381 people · 2019 | 3/5 | SYR4 |
| Dibromoacetic Acid | 4.3 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2019
Highest in the city: 5.42 µg/L — GOLDEN STATE WC - COWAN HEIGHTS · 6,997 people · 2019 | 4/5 | SYR4 |
| Arsenic | 2.635 µg/L 26% of the EPA limit 10 µg/L Main supplier: CITY OF ANAHEIM · 348,593 people · 2019
Highest in the city: 4.53 µg/L — GOLDEN STATE WC - WEST ORANGE COUNTY · 114,379 people · 2019 | 2/5 | SYR4 |
| Monobromoacetic Acid | 1.1 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2019
Highest in the city: 3.58 µg/L — GOLDEN STATE WC - PLACENTIA/YORBA LINDA · 50,381 people · 2019 | 4/5 | SYR4 |
| Gross Beta Particle Activity | 2.84 pCi/L No EPA limit set Highest in the city: GOLDEN STATE WC - WEST ORANGE COUNTY · 114,379 people · 2019 | 2/5 | SYR4 |
| 1,1-Dichloroethylene | 2.465 µg/L 35% of the EPA limit 7 µg/L Main supplier: CITY OF ANAHEIM · 348,593 people · 2019 | 1/5 | SYR4 |
| Chromium | 2.2 µg/L 2.2% of the EPA limit 100 µg/L Highest in the city: GOLDEN STATE WC - WEST ORANGE COUNTY · 114,379 people · 2019 | 1/5 | SYR4 |
| Trichloroethylene | 1.8 µg/L 36% of the EPA limit 5 µg/L Main supplier: CITY OF ANAHEIM · 348,593 people · 2019 | 2/5 | SYR4 |
| Combined Radium (-226 And -228) | 0.5684 pCi/L 11% of the EPA limit 5 pCi/L Main supplier: CITY OF ANAHEIM · 348,593 people · 2012 | 3/5 | SYR4 |
| PFOS | 0.0290 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2025 | 3/5 | UCMR-5 |
| Pfba | 0.0165 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2025 | 3/5 | UCMR-5 |
| Pfpea | 0.0124 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2025 | 4/5 | UCMR-5 |
| PFHXS | 0.0109 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2025 | 3/5 | UCMR-5 |
| PFOA | 0.0101 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2025 | 3/5 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF ANAHEIM · 348,593 people · 2024
Highest in the city: 0.0084 mg/L — GOLDEN STATE WC - COWAN HEIGHTS · 6,997 people · 2025 | 5/5 | LCR |
| Pfhxa | 0.0047 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2025
Highest in the city: 0.0077 µg/L — GOLDEN STATE WC - PLACENTIA/YORBA LINDA · 50,381 people · 2025 | 3/5 | UCMR-5 |
| PFBS | 0.0034 µg/L No EPA limit set Main supplier: CITY OF ANAHEIM · 348,593 people · 2025
Highest in the city: 0.0056 µg/L — GOLDEN STATE WC - PLACENTIA/YORBA LINDA · 50,381 people · 2025 | 2/5 | UCMR-5 |
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 Anaheim
| Supplier | Population served |
|---|---|
| CITY OF ANAHEIM | 348,593 |
| GOLDEN STATE WC - WEST ORANGE COUNTY | 114,379 |
| GOLDEN STATE WC - PLACENTIA/YORBA LINDA | 50,381 |
| GOLDEN STATE WC - COWAN HEIGHTS | 6,997 |
| HYNES ESTATES MUTUAL WATER CO. | 168 |
Frequently asked questions about Anaheim tap water
Is Anaheim tap water safe to drink?
EPA testing detected 32 contaminants in the water serving Anaheim. 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 Anaheim?
5 public water suppliers report drinking-water monitoring for Anaheim, California to the EPA. Each is listed above with its population served.
What contaminants are in Anaheim's water?
The contaminants EPA monitoring detected in Anaheim include Nitrate-Nitrite, Nitrate, Fluoride, Barium, 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.