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.
51
health-based violations
95
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2025-10-01 → 2025-12-31 |
| MCL | Health-based | Resolved | 2025-10-01 → 2025-12-31 |
| MCL | Health-based | Resolved | 2025-10-01 → 2025-12-31 |
| MCL | Health-based | Resolved | 2025-10-01 → 2025-12-31 |
| MCL | Health-based | Resolved | 2025-07-01 → 2025-09-30 |
| MCL | Health-based | Resolved | 2025-07-01 → 2025-09-30 |
| MCL | Health-based | Resolved | 2025-07-01 → 2025-09-30 |
| MCL | Health-based | Resolved | 2025-07-01 → 2025-09-30 |
| MCL | Health-based | Resolved | 2018-01-01 → 2018-03-31 |
| MCL | Health-based | Resolved | 2018-01-01 → 2018-03-31 |
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 |
|---|---|---|---|---|
| Chlorite | 532.6 µg/L 53% of the EPA limit 1000 µg/L
worst single sample: 1070 µg/L | 1209/1344 | SYR4 | 2013–2019 |
| Bromodichloromethane | 19.05 µg/L No EPA limit set
worst single sample: 56.7 µg/L | 280/302 | SYR4 | 2012–2019 |
| Dibromochloromethane | 24.905 µg/L No EPA limit set
worst single sample: 47.8 µg/L | 280/302 | SYR4 | 2012–2019 |
| Bromoform | 24.04 µg/L No EPA limit set
worst single sample: 59.4 µg/L | 273/302 | SYR4 | 2012–2019 |
| Chloroform | 9.495 µg/L No EPA limit set
worst single sample: 49.5 µg/L | 268/302 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 34.805 µg/L 58% of the EPA limit 60 µg/L
worst single sample: 57.7 µg/L | 240/255 | SYR4 | 2012–2019 |
| TTHM | 75.02 µg/L 94% of the EPA limit 80 µg/L
worst single sample: 158 µg/L | 239/255 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 14.975 µg/L No EPA limit set
worst single sample: 20.4 µg/L | 236/255 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 13.81 µg/L No EPA limit set
worst single sample: 31.7 µg/L | 227/255 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 6.68 µg/L No EPA limit set
worst single sample: 16 µg/L | 152/255 | SYR4 | 2012–2019 |
| Copper | 309.8 µg/L 24% of the EPA limit 1300 µg/L
worst single sample: 997 µg/L | 149/181 | SYR4 | 2012–2019 |
| Nitrate | 555 µg/L 5.6% of the EPA limit 10000 µg/L
worst single sample: 1740 µg/L | 116/124 | SYR4 | 2012–2019 |
| Lead | 9.602 µg/L 64% of the EPA limit 15 µg/L
worst single sample: 55.6 µg/L | 57/181 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 9.46 µg/L No EPA limit set
worst single sample: 11 µg/L | 52/255 | SYR4 | 2012–2019 |
| Fluoride | 600 µg/L 15% of the EPA limit 4000 µg/L
worst single sample: 750 µg/L | 49/49 | SYR4 | 2012–2019 |
| Cyanide | 150 µg/L 75% of the EPA limit 200 µg/L
worst single sample: 210 µg/L | 45/50 | SYR4 | 2012–2019 |
| Barium | 127.85 µg/L 6.4% of the EPA limit 2000 µg/L
worst single sample: 151 µg/L | 42/43 | SYR4 | 2012–2019 |
| Lithium | 50 µg/L No EPA limit set | 26/26 | UCMR-5 | 2023 |
| Selenium | 5.1 µg/L 10% of the EPA limit 50 µg/L
worst single sample: 13.2 µg/L | 21/43 | SYR4 | 2012–2019 |
| Arsenic | 6.1 µg/L 61% of the EPA limit 10 µg/L
worst single sample: 6.9 µg/L | 17/43 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 9.26 µg/L No EPA limit set
worst single sample: 10.7 µg/L | 17/255 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 13/13 | LCR | 2023 |
| Combined Uranium | 2.62 µg/L 8.7% of the EPA limit 30 µg/L
worst single sample: 2.8 µg/L | 7/9 | SYR4 | 2014–2017 |
| Gross Beta Particle Activity | 8.375 pCi/L No EPA limit set
worst single sample: 8.6 pCi/L | 6/10 | SYR4 | 2012–2017 |
| Nitrate-Nitrite | 1628 µg/L 16% of the EPA limit 10000 µg/L
worst single sample: 1770 µg/L | 5/7 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L | 2/4 | SYR4 | 2012–2017 |
| Dichloromethane | 1.485 µg/L 30% of the EPA limit 5 µg/L
worst single sample: 1.5 µg/L | 2/48 | SYR4 | 2012–2019 |
| Nitrite | 49 µg/L 4.9% of the EPA limit 1000 µg/L
worst single sample: 50 µg/L | 2/13 | SYR4 | 2012–2019 |
| Atrazine | 0.1100 µg/L 3.7% of the EPA limit 3 µg/L | 1/48 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 0.7900 µg/L 13% of the EPA limit 6 µg/L | 1/48 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 3 pCi/L 20% of the EPA limit 15 pCi/L | 1/9 | SYR4 | 2014–2017 |
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, TotalAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDalaponDi(2-ethylhexyl) AdipateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about North Alamo Wsc
Is North Alamo Wsc tap water safe to drink?
EPA monitoring detected 36 contaminants in North Alamo Wsc'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 North Alamo Wsc's water?
EPA monitoring detected Chlorite, Bromodichloromethane, Dibromochloromethane, Bromoform, Chloroform, and others. The full list with the level and data source for each is above.
How many people does North Alamo Wsc serve?
North Alamo Wsc reports serving 171,195 people in Texas, per its EPA record.
Has North Alamo Wsc had any water quality violations?
The EPA has 95 violations on file for North Alamo Wsc, of which 51 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.