Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
57
health-based violations
161
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Archived | 2026-01-01 → 2026-03-31 |
| MCL | Health-based | Archived | 2026-01-01 → 2026-03-31 |
| MCL | Health-based | Archived | 2026-01-01 → 2026-03-31 |
| MCL | Health-based | Archived | 2026-01-01 → 2026-03-31 |
| MCL | Health-based | Archived | 2025-10-01 → 2025-12-31 |
| MCL | Health-based | Archived | 2025-10-01 → 2025-12-31 |
| MCL | Health-based | Archived | 2025-10-01 → 2025-12-31 |
| MCL | Health-based | Archived | 2025-10-01 → 2025-12-31 |
| MCL | Health-based | Archived | 2025-07-01 → 2025-09-30 |
| MCL | Health-based | Archived | 2025-07-01 → 2025-09-30 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| Pfba | 0.0071 µg/L | 2/32 | 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 |
|---|---|---|---|---|
| Nitrate | 2316 µg/L 23% of the EPA limit 10000 µg/L
worst single sample: 2680 µg/L | 262/270 | SYR4 | 2012–2019 |
| Dibromochloromethane | 23.5 µg/L No EPA limit set
worst single sample: 30.6 µg/L | 196/228 | SYR4 | 2012–2019 |
| Bromodichloromethane | 26.76 µg/L No EPA limit set
worst single sample: 39 µg/L | 189/228 | SYR4 | 2012–2019 |
| Bromoform | 7.9 µg/L No EPA limit set
worst single sample: 62 µg/L | 185/228 | SYR4 | 2012–2019 |
| Chloroform | 24.3 µg/L No EPA limit set
worst single sample: 77 µg/L | 177/228 | SYR4 | 2012–2019 |
| Chlorite | 620.5 µg/L 62% of the EPA limit 1000 µg/L
worst single sample: 720 µg/L | 160/210 | SYR4 | 2013–2019 |
| TTHM | 80.44 µg/L 101% of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 96.4 µg/L | 129/131 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 22.84 µg/L 38% of the EPA limit 60 µg/L
worst single sample: 36.1 µg/L | 129/131 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 8 µg/L No EPA limit set
worst single sample: 9.1 µg/L | 124/131 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 11.84 µg/L No EPA limit set
worst single sample: 21.3 µg/L | 120/131 | SYR4 | 2012–2019 |
| Copper | 187.7 µg/L 14% of the EPA limit 1300 µg/L
worst single sample: 299 µg/L | 119/131 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 4.93 µg/L No EPA limit set
worst single sample: 17.7 µg/L | 88/131 | SYR4 | 2012–2019 |
| Fluoride | 1284 µg/L 32% of the EPA limit 4000 µg/L
worst single sample: 2100 µg/L | 57/57 | SYR4 | 2012–2019 |
| Barium | 43.25 µg/L 2.2% of the EPA limit 2000 µg/L
worst single sample: 111 µg/L | 56/56 | SYR4 | 2012–2019 |
| Lead | 6.36 µg/L 42% of the EPA limit 15 µg/L
worst single sample: 10.2 µg/L | 53/131 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 2 µg/L No EPA limit set
worst single sample: 4 µg/L | 41/131 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 2618 µg/L 26% of the EPA limit 10000 µg/L
worst single sample: 2680 µg/L | 23/26 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 2.52 pCi/L 50% of the EPA limit 5 pCi/L
worst single sample: 2.8 pCi/L | 15/16 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 6.06 pCi/L 40% of the EPA limit 15 pCi/L
worst single sample: 6.2 pCi/L | 15/32 | SYR4 | 2013–2019 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L | 14/14 | LCR | 2026 |
| Gross Beta Particle Activity | 11.5 pCi/L No EPA limit set
worst single sample: 12.1 pCi/L | 11/36 | SYR4 | 2012–2019 |
| Selenium | 24.3 µg/L 49% of the EPA limit 50 µg/L
worst single sample: 37.9 µg/L | 11/56 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 2.91 µg/L No EPA limit set
worst single sample: 3 µg/L | 10/131 | SYR4 | 2012–2019 |
| Lithium | 18.2 µg/L No EPA limit set | 7/32 | UCMR-5 | 2025 |
| Dichloromethane | 1.25 µg/L 25% of the EPA limit 5 µg/L
worst single sample: 1.3 µg/L | 6/97 | SYR4 | 2012–2019 |
| Xylenes, Total | 2.675 µg/L 0% of the EPA limit 10000 µg/L
worst single sample: 3.2 µg/L | 6/97 | SYR4 | 2012–2019 |
| Combined Uranium | 2.08 µg/L 6.9% of the EPA limit 30 µg/L
worst single sample: 2.2 µg/L | 5/32 | SYR4 | 2013–2019 |
| Arsenic | 8.635 µg/L 86% of the EPA limit 10 µg/L
worst single sample: 9.7 µg/L | 4/55 | SYR4 | 2012–2019 |
| Chromium | 3.7485 µg/L 3.7% of the EPA limit 100 µg/L
worst single sample: 3.78 µg/L | 4/56 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 1.1655 µg/L 19% of the EPA limit 6 µg/L
worst single sample: 1.2 µg/L | 4/63 | SYR4 | 2012–2019 |
| Cyanide | 48.5 µg/L 24% of the EPA limit 200 µg/L
worst single sample: 50 µg/L | 2/45 | SYR4 | 2013–2019 |
| Ethylbenzene | 0.9750 µg/L 0.1% of the EPA limit 700 µg/L
worst single sample: 1 µg/L | 2/97 | SYR4 | 2012–2019 |
| Carbon Tetrachloride | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/97 | SYR4 | 2012–2019 |
| Nitrite | 20 µg/L 2% of the EPA limit 1000 µg/L | 1/36 | SYR4 | 2012–2019 |
| Toluene | 0.9000 µg/L 0.1% of the EPA limit 1000 µg/L | 1/97 | SYR4 | 2012–2019 |
74 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-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranChlordaneDalaponDi(2-ethylhexyl) AdipateDinosebEthylene DibromideEndrinHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Clwsc Canyon Lake Shores
Is Clwsc Canyon Lake Shores tap water safe to drink?
EPA monitoring detected 36 contaminants in Clwsc Canyon Lake Shores'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 Clwsc Canyon Lake Shores's water?
EPA monitoring detected Nitrate, Dibromochloromethane, Bromodichloromethane, Bromoform, Chloroform, and others. The full list with the level and data source for each is above.
How many people does Clwsc Canyon Lake Shores serve?
Clwsc Canyon Lake Shores reports serving 44,196 people in Texas, per its EPA record.
Has Clwsc Canyon Lake Shores had any water quality violations?
The EPA has 161 violations on file for Clwsc Canyon Lake Shores, of which 57 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
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.