Compliance record
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
Other contaminants detected
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 this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 72.836 µg/L 91% of the EPA limit 80 µg/L
worst single sample: 107.32 µg/L | 53/53 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 32.92 µg/L 55% of the EPA limit 60 µg/L
worst single sample: 40.9 µg/L | 53/53 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 15.88 µg/L No EPA limit set
worst single sample: 19.1 µg/L | 53/53 | SYR4 | 2012–2019 |
| Bromodichloromethane | 16.233 µg/L No EPA limit set
worst single sample: 18.52 µg/L | 52/52 | SYR4 | 2012–2019 |
| Chloroform | 54.1385 µg/L No EPA limit set
worst single sample: 81.09 µg/L | 52/52 | SYR4 | 2012–2019 |
| Dibromochloromethane | 6.315 µg/L No EPA limit set
worst single sample: 7.17 µg/L | 51/52 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 17.86 µg/L No EPA limit set
worst single sample: 23.7 µg/L | 49/53 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 2.665 µg/L No EPA limit set
worst single sample: 4.1 µg/L | 30/53 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 18/18 | LCR | 2025 |
| Bromoform | 2.8955 µg/L No EPA limit set
worst single sample: 3 µg/L | 12/52 | SYR4 | 2012–2019 |
| Fluoride | 210 µg/L 5.3% of the EPA limit 4000 µg/L
worst single sample: 240 µg/L | 11/16 | SYR4 | 2012–2019 |
| Nitrate | 678 µg/L 6.8% of the EPA limit 10000 µg/L | 10/32 | SYR4 | 2012–2019 |
| Bromate | 36.2 µg/L 362% of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 37 µg/L | 9/72 | SYR4 | 2012–2019 |
| Arsenic | 6.045 µg/L 60% of the EPA limit 10 µg/L
worst single sample: 6.5 µg/L | 8/16 | SYR4 | 2012–2019 |
| Lithium | 24 µg/L No EPA limit set | 3/4 | UCMR-5 | 2023 |
| Barium | 140 µg/L 7% of the EPA limit 2000 µg/L | 1/16 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 3.9 µg/L No EPA limit set | 1/53 | SYR4 | 2012–2019 |
85 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCopperCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Konocti County Water District
Is Konocti County Water District tap water safe to drink?
EPA monitoring detected 19 contaminants in Konocti County Water District's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Konocti County Water District's water?
EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Trichloroacetic Acid, Bromodichloromethane, Chloroform, and others. The full list with the level and data source for each is above.
How many people does Konocti County Water District serve?
Konocti County Water District reports serving 5,928 people in California, per its EPA record.
Has Konocti County Water District had any water quality violations?
The EPA has no formal drinking-water violations on file for Konocti County Water District.
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.