What was found in Clovis'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 | 8600 µg/L 86% of the EPA limit 10000 µg/L Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 2/3 | SYR4 |
| Nitrate-Nitrite | 6675 µg/L 67% of the EPA limit 10000 µg/L Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 1/3 | SYR4 |
| Fluoride | 187 µg/L 4.7% of the EPA limit 4000 µg/L Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 1/3 | SYR4 |
| Barium | 168.5 µg/L 8.4% of the EPA limit 2000 µg/L Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 2/3 | SYR4 |
| TTHM | 58 µg/L 73% of the EPA limit 80 µg/L Main supplier: CITY OF CLOVIS · 130,130 people · 2019
Highest in the city: 112 µg/L — LAS DELTAS MUTUAL WATER COMPANY · 375 people · 2019 | 2/3 | SYR4 |
| Bromoform | 1.39 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2019
Highest in the city: 77.2 µg/L — LAS DELTAS MUTUAL WATER COMPANY · 375 people · 2019 | 2/3 | SYR4 |
| Copper | 74 µg/L 5.7% of the EPA limit 1300 µg/L Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 2/3 | SYR4 |
| Chloroform | 56 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 31.1 µg/L 52% of the EPA limit 60 µg/L Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 3.65 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2019
Highest in the city: 29.6 µg/L — LAS DELTAS MUTUAL WATER COMPANY · 375 people · 2019 | 2/3 | SYR4 |
| Selenium | 24 µg/L 48% of the EPA limit 50 µg/L Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 1/3 | SYR4 |
| Dichloroacetic Acid | 18 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.86 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2019
Highest in the city: 17 µg/L — LAS DELTAS MUTUAL WATER COMPANY · 375 people · 2019 | 2/3 | SYR4 |
| Trichloroacetic Acid | 10 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 1/3 | SYR4 |
| Bromodichloromethane | 6.47 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2019
Highest in the city: 6.5 µg/L — LAS DELTAS MUTUAL WATER COMPANY · 375 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 6.285 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 1/3 | SYR4 |
| Lead | 5.9 µg/L 39% of the EPA limit 15 µg/L Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 2/3 | SYR4 |
| Arsenic | 3.55 µg/L 36% of the EPA limit 10 µg/L Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2019
Highest in the city: 2.25 µg/L — LAS DELTAS MUTUAL WATER COMPANY · 375 people · 2019 | 2/3 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.3200 µg/L 160% of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 1/3 | SYR4 |
| PFOS | 0.0410 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2024 | 1/3 | UCMR-5 |
| Ethylene Dibromide | 0.0200 µg/L 40% of the EPA limit 0.0500 µg/L Main supplier: CITY OF CLOVIS · 130,130 people · 2019 | 1/3 | SYR4 |
| PFOA | 0.0180 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2024 | 1/3 | UCMR-5 |
| PFHXS | 0.0088 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2024 | 1/3 | UCMR-5 |
| Pfpea | 0.0084 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2024 | 1/3 | UCMR-5 |
| Pfhxa | 0.0080 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2024 | 1/3 | UCMR-5 |
| PFBS | 0.0079 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2024 | 1/3 | UCMR-5 |
| PFNA | 0.0069 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2024 | 1/3 | UCMR-5 |
| Pfba | 0.0061 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2024 | 1/3 | UCMR-5 |
| Pfhpa | 0.0057 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2024 | 1/3 | UCMR-5 |
| Pfda | 0.0031 µg/L No EPA limit set Main supplier: CITY OF CLOVIS · 130,130 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF CLOVIS · 130,130 people · 2024
Highest in the city: 0.0028 mg/L — SHAVER LAKE HEIGHTS MWC · 836 people · 2023 | 3/3 | 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 Clovis
| Supplier | Population served |
|---|---|
| CITY OF CLOVIS | 130,130 |
| SHAVER LAKE HEIGHTS MWC | 836 |
| LAS DELTAS MUTUAL WATER COMPANY | 375 |
Frequently asked questions about Clovis tap water
Is Clovis tap water safe to drink?
EPA testing detected 32 contaminants in the water serving Clovis. 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 Clovis?
3 public water suppliers report drinking-water monitoring for Clovis, California to the EPA. Each is listed above with its population served.
What contaminants are in Clovis's water?
The contaminants EPA monitoring detected in Clovis include Nitrate, Nitrate-Nitrite, Fluoride, Barium, TTHM. 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.