What was found in Seal Beach'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 |
|---|---|---|---|
| Fluoride | 520.4999999999999 µg/L 13% of the EPA limit 4000 µg/L Main supplier: CITY OF SEAL BEACH · 24,937 people · 2018 | 1/1 | SYR4 |
| Monochloroacetic Acid | 88.43999999999998 µg/L No EPA limit set Main supplier: CITY OF SEAL BEACH · 24,937 people · 2019 | 1/1 | SYR4 |
| TTHM | 37.56 µg/L 47% of the EPA limit 80 µg/L Main supplier: CITY OF SEAL BEACH · 24,937 people · 2019 | 1/1 | SYR4 |
| Lithium | 35.4811 µg/L No EPA limit set Main supplier: CITY OF SEAL BEACH · 24,937 people · 2025 | 1/1 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 24.015000000000008 µg/L 40% of the EPA limit 60 µg/L Main supplier: CITY OF SEAL BEACH · 24,937 people · 2019 | 1/1 | SYR4 |
| Chloroform | 19.719999999999995 µg/L No EPA limit set Main supplier: CITY OF SEAL BEACH · 24,937 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 10.539999999999997 µg/L No EPA limit set Main supplier: CITY OF SEAL BEACH · 24,937 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 10.479999999999999 µg/L No EPA limit set Main supplier: CITY OF SEAL BEACH · 24,937 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 7.779000000000002 µg/L No EPA limit set Main supplier: CITY OF SEAL BEACH · 24,937 people · 2019 | 1/1 | SYR4 |
| Bromoform | 7.6464999999999925 µg/L No EPA limit set Main supplier: CITY OF SEAL BEACH · 24,937 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 6.517999999999997 µg/L No EPA limit set Main supplier: CITY OF SEAL BEACH · 24,937 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 5.167319999999997 µg/L 17% of the EPA limit 30 µg/L Main supplier: CITY OF SEAL BEACH · 24,937 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 5.02 µg/L No EPA limit set Main supplier: CITY OF SEAL BEACH · 24,937 people · 2019 | 1/1 | SYR4 |
| Arsenic | 2.34 µg/L 23% of the EPA limit 10 µg/L Main supplier: CITY OF SEAL BEACH · 24,937 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 0.3615 pCi/L 7.2% of the EPA limit 5 pCi/L Main supplier: CITY OF SEAL BEACH · 24,937 people · 2012 | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF SEAL BEACH · 24,937 people · 2024 | 1/1 | LCR |
Water suppliers serving Seal Beach
| Supplier | Population served |
|---|---|
| CITY OF SEAL BEACH | 24,937 |
Frequently asked questions about Seal Beach tap water
Is Seal Beach tap water safe to drink?
EPA testing detected 16 contaminants in the water serving Seal Beach. 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 Seal Beach?
1 public water supplier report drinking-water monitoring for Seal Beach, California to the EPA. Each is listed above with its population served.
What contaminants are in Seal Beach's water?
The contaminants EPA monitoring detected in Seal Beach include Fluoride, Monochloroacetic Acid, TTHM, Lithium, Total Haloacetic Acids (HAA5). 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.