What was found in Spring Valley'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 | 8100 µg/L 81% of the EPA limit 10000 µg/L Highest in the city: SAN PASQUAL ACADEMY · 298 people · 2019 | 4/5 | SYR4 |
| Nitrate-Nitrite | 4700 µg/L 47% of the EPA limit 10000 µg/L Highest in the city: SAN PASQUAL ACADEMY · 298 people · 2017 | 3/5 | SYR4 |
| Fluoride | 712 µg/L 18% of the EPA limit 4000 µg/L Highest in the city: CAMPO HILLS-COUNTY PUBLIC WORKS WASTEWTR · 500 people · 2017 | 4/5 | SYR4 |
| Nitrite | 548 µg/L 55% of the EPA limit 1000 µg/L Highest in the city: CAMPO HILLS-COUNTY PUBLIC WORKS WASTEWTR · 500 people · 2019 | 1/5 | SYR4 |
| Barium | 318.5 µg/L 16% of the EPA limit 2000 µg/L Highest in the city: LIVE OAK SPRINGS WATER SYSTEM · 317 people · 2019 | 4/5 | SYR4 |
| Combined Uranium | 73.01 µg/L 243% of the EPA limit, at the 95th percentile of samples — 30 µg/L Highest in the city: CAMPO HILLS-COUNTY PUBLIC WORKS WASTEWTR · 500 people · 2019 | 3/5 | SYR4 |
| TTHM | 55.1 µg/L 69% of the EPA limit 80 µg/L Main supplier: OTAY WATER DISTRICT · 238,008 people · 2019 | 3/5 | SYR4 |
| Lithium | 28.9 µg/L No EPA limit set Main supplier: OTAY WATER DISTRICT · 238,008 people · 2024 | 1/5 | UCMR-5 |
| Bromoform | 12 µg/L No EPA limit set Main supplier: OTAY WATER DISTRICT · 238,008 people · 2019
Highest in the city: 22.9 µg/L — CAMPO HILLS-COUNTY PUBLIC WORKS WASTEWTR · 500 people · 2019 | 3/5 | SYR4 |
| Dibromochloromethane | 19.5 µg/L No EPA limit set Main supplier: OTAY WATER DISTRICT · 238,008 people · 2019 | 3/5 | SYR4 |
| Bromodichloromethane | 16 µg/L No EPA limit set Main supplier: OTAY WATER DISTRICT · 238,008 people · 2019 | 3/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 16 µg/L 27% of the EPA limit 60 µg/L Main supplier: OTAY WATER DISTRICT · 238,008 people · 2019 | 3/5 | SYR4 |
| Chloroform | 15.5 µg/L No EPA limit set Main supplier: OTAY WATER DISTRICT · 238,008 people · 2019 | 1/5 | SYR4 |
| Dichloroacetic Acid | 8.915 µg/L No EPA limit set Main supplier: OTAY WATER DISTRICT · 238,008 people · 2019 | 2/5 | SYR4 |
| Copper | 8.9 µg/L 0.7% of the EPA limit 1300 µg/L Highest in the city: CAMPO HILLS-COUNTY PUBLIC WORKS WASTEWTR · 500 people · 2017 | 1/5 | SYR4 |
| Gross Beta Particle Activity | 7.9135 pCi/L No EPA limit set Highest in the city: CAMPO HILLS-COUNTY PUBLIC WORKS WASTEWTR · 500 people · 2016 | 2/5 | SYR4 |
| Dibromoacetic Acid | 4.6 µg/L No EPA limit set Main supplier: OTAY WATER DISTRICT · 238,008 people · 2019
Highest in the city: 7.17 µg/L — CAMPO HILLS-COUNTY PUBLIC WORKS WASTEWTR · 500 people · 2019 | 3/5 | SYR4 |
| Monochloroacetic Acid | 4.95 µg/L No EPA limit set Main supplier: OTAY WATER DISTRICT · 238,008 people · 2019 | 3/5 | SYR4 |
| Trichloroacetic Acid | 4.3 µg/L No EPA limit set Main supplier: OTAY WATER DISTRICT · 238,008 people · 2019 | 2/5 | SYR4 |
| Arsenic | 2.19 µg/L 22% of the EPA limit 10 µg/L Highest in the city: CAMPO HILLS-COUNTY PUBLIC WORKS WASTEWTR · 500 people · 2017 | 3/5 | SYR4 |
| Monobromoacetic Acid | 1.2 µg/L No EPA limit set Main supplier: OTAY WATER DISTRICT · 238,008 people · 2019
Highest in the city: 1.495 µg/L — CAMPO HILLS-COUNTY PUBLIC WORKS WASTEWTR · 500 people · 2019 | 2/5 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: OTAY WATER DISTRICT · 238,008 people · 2023 | 5/5 | 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 Spring Valley
| Supplier | Population served |
|---|---|
| OTAY WATER DISTRICT | 238,008 |
| CAMPO HILLS-COUNTY PUBLIC WORKS WASTEWTR | 500 |
| LIVE OAK SPRINGS WATER SYSTEM | 317 |
| SAN PASQUAL ACADEMY | 298 |
| RANCHO DEL CAMPO WATER SYSTEM | 290 |
Frequently asked questions about Spring Valley tap water
Is Spring Valley tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Spring Valley. 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 Spring Valley?
5 public water suppliers report drinking-water monitoring for Spring Valley, California to the EPA. Each is listed above with its population served.
What contaminants are in Spring Valley's water?
The contaminants EPA monitoring detected in Spring Valley include Nitrate, Nitrate-Nitrite, Fluoride, Nitrite, Barium. 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.