What was found in Carmel 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-Nitrite | 285005 µg/L 2850% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: TASSAJARA SPRINGS WS · 150 people · 2017
Highest in the city: 740000 µg/L — CACHAGUA MUTUAL WS (#4) · 55 people · 2017 | 6/6 | SYR4 |
| Fluoride | 200 µg/L 5% of the EPA limit 4000 µg/L Main supplier: TASSAJARA SPRINGS WS · 150 people · 2017
Highest in the city: 7740 µg/L — ASOLEADO MWC · 101 people · 2019 | 6/6 | SYR4 |
| Nitrate | 200 µg/L 2% of the EPA limit 10000 µg/L Main supplier: TASSAJARA SPRINGS WS · 150 people · 2017
Highest in the city: 2300 µg/L — WOODSIDE WA · 73 people · 2019 | 5/6 | SYR4 |
| Nitrite | 190.005 µg/L 19% of the EPA limit 1000 µg/L Main supplier: TASSAJARA SPRINGS WS · 150 people · 2017
Highest in the city: 800 µg/L — CACHAGUA MUTUAL WS (#4) · 55 people · 2017 | 5/6 | SYR4 |
| Barium | 9.9 µg/L 0.5% of the EPA limit 2000 µg/L Main supplier: TASSAJARA SPRINGS WS · 150 people · 2017
Highest in the city: 109.9 µg/L — CACHAGUA MUTUAL WS (#4) · 55 people · 2017 | 6/6 | SYR4 |
| Lead | 36.2 µg/L 241% of the EPA limit, at the 95th percentile of samples — 15 µg/L Highest in the city: CACHAGUA MUTUAL WS (#4) · 55 people · 2017 | 4/6 | SYR4 |
| Chromium | 1.95 µg/L 2% of the EPA limit 100 µg/L Main supplier: TASSAJARA SPRINGS WS · 150 people · 2017
Highest in the city: 32.55 µg/L — CACHAGUA MUTUAL WS (#4) · 55 people · 2017 | 5/6 | SYR4 |
| Selenium | 2.95 µg/L 5.9% of the EPA limit 50 µg/L Main supplier: TASSAJARA SPRINGS WS · 150 people · 2017
Highest in the city: 28.6 µg/L — TULARCITOS MWC · 90 people · 2016 | 6/6 | SYR4 |
| Copper | 18.55 µg/L 1.4% of the EPA limit 1300 µg/L Main supplier: TASSAJARA SPRINGS WS · 150 people · 2017
Highest in the city: 26.7 µg/L — CACHAGUA MUTUAL WS (#4) · 55 people · 2017 | 5/6 | SYR4 |
| TTHM | 16.2 µg/L 20% of the EPA limit 80 µg/L Main supplier: TASSAJARA SPRINGS WS · 150 people · 2019 | 2/6 | SYR4 |
| Diquat | 14 µg/L 70% of the EPA limit 20 µg/L Highest in the city: ASOLEADO MWC · 101 people · 2019 | 1/6 | SYR4 |
| Arsenic | 10.1 µg/L 101% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: TULARCITOS MWC · 90 people · 2019 | 4/6 | SYR4 |
| Bromoform | 6 µg/L No EPA limit set Main supplier: TASSAJARA SPRINGS WS · 150 people · 2019
Highest in the city: 8.71 µg/L — TULARCITOS MWC · 90 people · 2019 | 2/6 | SYR4 |
| Dibromochloromethane | 3.9 µg/L No EPA limit set Main supplier: TASSAJARA SPRINGS WS · 150 people · 2019
Highest in the city: 5.95 µg/L — TULARCITOS MWC · 90 people · 2019 | 2/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 4.9 µg/L 8.2% of the EPA limit 60 µg/L Main supplier: TASSAJARA SPRINGS WS · 150 people · 2019
Highest in the city: 5.85 µg/L — TULARCITOS MWC · 90 people · 2017 | 2/6 | SYR4 |
| Dibromoacetic Acid | 2 µg/L No EPA limit set Main supplier: TASSAJARA SPRINGS WS · 150 people · 2019
Highest in the city: 4.9 µg/L — TULARCITOS MWC · 90 people · 2017 | 2/6 | SYR4 |
| Bromodichloromethane | 3.9 µg/L No EPA limit set Main supplier: TASSAJARA SPRINGS WS · 150 people · 2019 | 2/6 | SYR4 |
| Chloroform | 3 µg/L No EPA limit set Main supplier: TASSAJARA SPRINGS WS · 150 people · 2019 | 1/6 | SYR4 |
| Dichloroacetic Acid | 2.9 µg/L No EPA limit set Main supplier: TASSAJARA SPRINGS WS · 150 people · 2019 | 1/6 | SYR4 |
| Cadmium | 1.9 µg/L 38% of the EPA limit 5 µg/L Highest in the city: CACHAGUA MUTUAL WS (#4) · 55 people · 2018 | 2/6 | SYR4 |
| Combined Uranium | 1.49 µg/L 5% of the EPA limit 30 µg/L Highest in the city: ASOLEADO MWC · 101 people · 2019 | 1/6 | SYR4 |
| Trichloroacetic Acid | 1 µg/L No EPA limit set Highest in the city: TULARCITOS MWC · 90 people · 2017 | 1/6 | SYR4 |
| Beryllium, Total | 0.7000 µg/L 18% of the EPA limit 4 µg/L Highest in the city: CACHAGUA MUTUAL WS (#4) · 55 people · 2017 | 1/6 | SYR4 |
| Lead | 0.0037 mg/L 25% of the EPA limit 0.0150 mg/L Main supplier: TASSAJARA SPRINGS WS · 150 people · 2027
Highest in the city: 0.0062 mg/L — ASOLEADO MWC · 101 people · 2025 | 6/6 | 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 Carmel Valley
| Supplier | Population served |
|---|---|
| TASSAJARA SPRINGS WS | 150 |
| ASOLEADO MWC | 101 |
| TULARCITOS MWC | 90 |
| WOODSIDE WA | 73 |
| CACHAGUA MUTUAL WS (#4) | 55 |
| OUTLOOK WA | 35 |
Frequently asked questions about Carmel Valley tap water
Is Carmel Valley tap water safe to drink?
EPA testing detected 24 contaminants in the water serving Carmel 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 Carmel Valley?
6 public water suppliers report drinking-water monitoring for Carmel Valley, California to the EPA. Each is listed above with its population served.
What contaminants are in Carmel Valley's water?
The contaminants EPA monitoring detected in Carmel Valley include Nitrate-Nitrite, Fluoride, Nitrate, 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.