What was found in Fullerton'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 | 4201 µg/L 42% of the EPA limit 10000 µg/L Main supplier: CITY OF FULLERTON · 139,461 people · 2019
Highest in the city: 6427.5 µg/L — PAGE AVENUE MUTUAL WATER COMPANY · 119 people · 2019 | 2/2 | SYR4 |
| Nitrate | 4791.2 µg/L 48% of the EPA limit 10000 µg/L Main supplier: CITY OF FULLERTON · 139,461 people · 2019
Highest in the city: 6380 µg/L — PAGE AVENUE MUTUAL WATER COMPANY · 119 people · 2019 | 2/2 | SYR4 |
| Fluoride | 611 µg/L 15% of the EPA limit 4000 µg/L Main supplier: CITY OF FULLERTON · 139,461 people · 2019 | 2/2 | SYR4 |
| Barium | 120.1 µg/L 6% of the EPA limit 2000 µg/L Highest in the city: PAGE AVENUE MUTUAL WATER COMPANY · 119 people · 2017 | 1/2 | SYR4 |
| TTHM | 46.53 µg/L 58% of the EPA limit 80 µg/L Main supplier: CITY OF FULLERTON · 139,461 people · 2019 | 2/2 | SYR4 |
| Lithium | 34.9834 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2025 | 1/2 | UCMR-5 |
| Combined Uranium | 12.0116 µg/L 40% of the EPA limit 30 µg/L Main supplier: CITY OF FULLERTON · 139,461 people · 2018
Highest in the city: 20.1485 µg/L — PAGE AVENUE MUTUAL WATER COMPANY · 119 people · 2018 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 19.671 µg/L 33% of the EPA limit 60 µg/L Main supplier: CITY OF FULLERTON · 139,461 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 15.665 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2019 | 2/2 | SYR4 |
| Chloroform | 15.23 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 14.165 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2019 | 1/2 | SYR4 |
| Bromoform | 7.9 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2019
Highest in the city: 11.664 µg/L — PAGE AVENUE MUTUAL WATER COMPANY · 119 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 10.662 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2019 | 1/2 | SYR4 |
| Selenium | 9.98 µg/L 20% of the EPA limit 50 µg/L Main supplier: CITY OF FULLERTON · 139,461 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 7.088 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 6.676 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2019 | 1/2 | SYR4 |
| 1,1-Dichloroethylene | 1.77 µg/L 25% of the EPA limit 7 µg/L Main supplier: CITY OF FULLERTON · 139,461 people · 2019
Highest in the city: 5.7 µg/L — PAGE AVENUE MUTUAL WATER COMPANY · 119 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 5.016 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2019 | 2/2 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: CITY OF FULLERTON · 139,461 people · 2019 | 1/2 | SYR4 |
| Tetrachloroethylene | 2 µg/L 40% of the EPA limit 5 µg/L Main supplier: CITY OF FULLERTON · 139,461 people · 2019 | 1/2 | SYR4 |
| Trichloroethylene | 2 µg/L 40% of the EPA limit 5 µg/L Main supplier: CITY OF FULLERTON · 139,461 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 1.808 µg/L No EPA limit set Highest in the city: PAGE AVENUE MUTUAL WATER COMPANY · 119 people · 2019 | 1/2 | SYR4 |
| PFOS | 0.0133 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2025 | 1/2 | UCMR-5 |
| Pfpea | 0.0132 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2025 | 1/2 | UCMR-5 |
| Pfhxa | 0.0124 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2025 | 1/2 | UCMR-5 |
| PFOA | 0.0108 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2025 | 1/2 | UCMR-5 |
| PFBS | 0.0076 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2025 | 1/2 | UCMR-5 |
| PFHXS | 0.0062 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2025 | 1/2 | UCMR-5 |
| Pfba | 0.0059 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2025 | 1/2 | UCMR-5 |
| Pfhpa | 0.0048 µg/L No EPA limit set Main supplier: CITY OF FULLERTON · 139,461 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0015 mg/L 10% of the EPA limit 0.0150 mg/L Main supplier: CITY OF FULLERTON · 139,461 people · 2024 | 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 Fullerton
| Supplier | Population served |
|---|---|
| CITY OF FULLERTON | 139,461 |
| PAGE AVENUE MUTUAL WATER COMPANY | 119 |
Frequently asked questions about Fullerton tap water
Is Fullerton tap water safe to drink?
EPA testing detected 31 contaminants in the water serving Fullerton. 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 Fullerton?
2 public water suppliers report drinking-water monitoring for Fullerton, California to the EPA. Each is listed above with its population served.
What contaminants are in Fullerton's water?
The contaminants EPA monitoring detected in Fullerton 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.