What was found in Kelseyville'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 | 600 µg/L 6% of the EPA limit 10000 µg/L Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2019
Highest in the city: 4746 µg/L — INNISFREE WATER COMPANY · 56 people · 2019 | 4/6 | SYR4 |
| Fluoride | 191 µg/L 4.8% of the EPA limit 4000 µg/L Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2019
Highest in the city: 236 µg/L — CLEAR WATER MUTUAL WATER COMPANY · 252 people · 2019 | 6/6 | SYR4 |
| Barium | 158.5 µg/L 7.9% of the EPA limit 2000 µg/L Highest in the city: CLEAR WATER MUTUAL WATER COMPANY · 252 people · 2019 | 2/6 | SYR4 |
| TTHM | 95.319 µg/L 119% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2019
Highest in the city: 104.925 µg/L — HARBOR VIEW MUTUAL WATER COMPANY · 550 people · 2019 | 5/6 | SYR4 |
| Chloroform | 78.634 µg/L No EPA limit set Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2019
Highest in the city: 89.273 µg/L — HARBOR VIEW MUTUAL WATER COMPANY · 550 people · 2019 | 5/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 64.76 µg/L 108% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2019
Highest in the city: 71.73 µg/L — HARBOR VIEW MUTUAL WATER COMPANY · 550 people · 2019 | 5/6 | SYR4 |
| Dichloroacetic Acid | 38.495 µg/L No EPA limit set Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2019
Highest in the city: 44.08 µg/L — HARBOR VIEW MUTUAL WATER COMPANY · 550 people · 2019 | 5/6 | SYR4 |
| Trichloroacetic Acid | 22.105 µg/L No EPA limit set Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2019
Highest in the city: 41.32 µg/L — BUCKINGHAM PARK WATER DISTRICT · 1,521 people · 2019 | 5/6 | SYR4 |
| Lithium | 26 µg/L No EPA limit set Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2024 | 1/6 | UCMR-5 |
| Bromoform | 16.5625 µg/L No EPA limit set Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2019 | 3/6 | SYR4 |
| Bromodichloromethane | 12.677 µg/L No EPA limit set Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2019
Highest in the city: 15.391 µg/L — HARBOR VIEW MUTUAL WATER COMPANY · 550 people · 2019 | 5/6 | SYR4 |
| Bromate | 14 µg/L 140% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: INNISFREE WATER COMPANY · 56 people · 2019 | 1/6 | SYR4 |
| Monochloroacetic Acid | 7.315 µg/L No EPA limit set Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2019 | 4/6 | SYR4 |
| Arsenic | 3.51 µg/L 35% of the EPA limit 10 µg/L Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2019
Highest in the city: 6.6 µg/L — BUCKINGHAM PARK WATER DISTRICT · 1,521 people · 2019 | 4/6 | SYR4 |
| Selenium | 5 µg/L 10% of the EPA limit 50 µg/L Highest in the city: BUCKINGHAM PARK WATER DISTRICT · 1,521 people · 2019 | 1/6 | SYR4 |
| Dibromoacetic Acid | 4.48 µg/L No EPA limit set Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2019 | 5/6 | SYR4 |
| Dibromochloromethane | 4.008 µg/L No EPA limit set Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2019
Highest in the city: 4.33 µg/L — CLEAR WATER MUTUAL WATER COMPANY · 252 people · 2019 | 5/6 | SYR4 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2019
Highest in the city: 1.645 µg/L — BUCKINGHAM PARK WATER DISTRICT · 1,521 people · 2019 | 2/6 | SYR4 |
| Toluene | 0.8100 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the city: BUCKINGHAM PARK WATER DISTRICT · 1,521 people · 2017 | 1/6 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: MT. KONOCTI MUTUAL WATER COMPANY · 4,360 people · 2024 | 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 Kelseyville
| Supplier | Population served |
|---|---|
| MT. KONOCTI MUTUAL WATER COMPANY | 4,360 |
| BUCKINGHAM PARK WATER DISTRICT | 1,521 |
| HARBOR VIEW MUTUAL WATER COMPANY | 550 |
| CLEAR WATER MUTUAL WATER COMPANY | 252 |
| WALNUT COVE MOBILE ESTATES | 200 |
| INNISFREE WATER COMPANY | 56 |
Frequently asked questions about Kelseyville tap water
Is Kelseyville tap water safe to drink?
EPA testing detected 20 contaminants in the water serving Kelseyville. 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 Kelseyville?
6 public water suppliers report drinking-water monitoring for Kelseyville, California to the EPA. Each is listed above with its population served.
What contaminants are in Kelseyville's water?
The contaminants EPA monitoring detected in Kelseyville include Nitrate, Fluoride, Barium, TTHM, Chloroform. 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.