What was found in Chula Vista'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 | 651.3 µg/L 16% of the EPA limit 4000 µg/L Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Nitrate | 500 µg/L 5% of the EPA limit 10000 µg/L Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 500 µg/L 5% of the EPA limit 10000 µg/L Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Barium | 180 µg/L 9% of the EPA limit 2000 µg/L Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Copper | 85.7 µg/L 6.6% of the EPA limit 1300 µg/L Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| TTHM | 45.71 µg/L 57% of the EPA limit 80 µg/L Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 32.1 µg/L 54% of the EPA limit 60 µg/L Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Lithium | 28 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/1 | UCMR-5 |
| Dibromochloromethane | 17.39 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Gross Beta Particle Activity | 15.25 pCi/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2018 | 1/1 | SYR4 |
| Dichloroacetic Acid | 15 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Selenium | 14.85 µg/L 30% of the EPA limit 50 µg/L Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 14.165 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Chloroform | 14.1 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 12.3521 µg/L 41% of the EPA limit 30 µg/L Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 11 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Bromoform | 9.75 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 6 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 4.3 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Arsenic | 3.87 µg/L 39% of the EPA limit 10 µg/L Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 2.87 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/1 | SYR4 |
| Pfba | 0.0123 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/1 | UCMR-5 |
| PFOA | 0.0114 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/1 | UCMR-5 |
| PFBS | 0.0110 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/1 | UCMR-5 |
| PFHXS | 0.0094 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/1 | UCMR-5 |
| Pfhxa | 0.0086 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/1 | UCMR-5 |
| Pfpea | 0.0076 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/1 | UCMR-5 |
| PFOS | 0.0057 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/1 | UCMR-5 |
| Pfhpa | 0.0047 µg/L No EPA limit set Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: SWEETWATER AUTHORITY · 191,282 people · 2023 | 1/1 | 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 Chula Vista
| Supplier | Population served |
|---|---|
| SWEETWATER AUTHORITY | 191,282 |
Frequently asked questions about Chula Vista tap water
Is Chula Vista tap water safe to drink?
EPA testing detected 30 contaminants in the water serving Chula Vista. 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 Chula Vista?
1 public water supplier report drinking-water monitoring for Chula Vista, California to the EPA. Each is listed above with its population served.
What contaminants are in Chula Vista's water?
The contaminants EPA monitoring detected in Chula Vista include Fluoride, Nitrate, Nitrate-Nitrite, Barium, Copper. 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.