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.
24
health-based violations
36
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2025-01-01 → 2025-03-31 |
| MCL | Health-based | Resolved | 2025-01-01 → 2025-03-31 |
| MCL | Health-based | Resolved | 2025-01-01 → 2025-03-31 |
| MCL | Health-based | Resolved | 2025-01-01 → 2025-03-31 |
| MCL | Health-based | Resolved | 2017-07-01 → 2017-09-30 |
| MCL | Health-based | Resolved | 2017-07-01 → 2017-09-30 |
| MCL | Health-based | Resolved | 2017-07-01 → 2017-09-30 |
| MCL | Health-based | Resolved | 2017-07-01 → 2017-09-30 |
| MCL | Health-based | Resolved | 2017-07-01 → 2017-09-30 |
| MCL | Health-based | Resolved | 2017-07-01 → 2017-09-30 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| Pfba | 0.0054 µg/L | 2/4 | 2024 |
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 |
|---|---|---|---|---|
| Bromodichloromethane | 21 µg/L No EPA limit set
worst single sample: 22.8 µg/L | 61/61 | SYR4 | 2012–2019 |
| Chloroform | 59 µg/L No EPA limit set
worst single sample: 85.5 µg/L | 61/61 | SYR4 | 2012–2019 |
| TTHM | 85.66 µg/L 107% of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 110 µg/L | 58/58 | SYR4 | 2012–2019 |
| Copper | 820 µg/L 63% of the EPA limit 1300 µg/L
worst single sample: 1300 µg/L | 57/65 | SYR4 | 2013–2019 |
| Total Haloacetic Acids (HAA5) | 71.84 µg/L 120% of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 87.4 µg/L | 57/58 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 33.2 µg/L No EPA limit set
worst single sample: 49 µg/L | 56/58 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 33.75 µg/L No EPA limit set
worst single sample: 38.8 µg/L | 56/58 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 2.92 µg/L No EPA limit set
worst single sample: 3.8 µg/L | 49/58 | SYR4 | 2012–2019 |
| Dibromochloromethane | 5.48 µg/L No EPA limit set
worst single sample: 6 µg/L | 49/61 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 3.655 µg/L No EPA limit set
worst single sample: 4.9 µg/L | 30/58 | SYR4 | 2012–2019 |
| Lead | 14.8 µg/L 99% of the EPA limit 15 µg/L
worst single sample: 87 µg/L | 20/65 | SYR4 | 2013–2019 |
| Nitrate-Nitrite | 1000 µg/L 10% of the EPA limit 10000 µg/L | 12/16 | SYR4 | 2012–2019 |
| Lead | 0.0033 mg/L 22% of the EPA limit 0.0150 mg/L | 11/11 | LCR | 2025 |
| Monobromoacetic Acid | 3.38 µg/L No EPA limit set
worst single sample: 4.3 µg/L | 9/58 | SYR4 | 2012–2019 |
| Fluoride | 107 µg/L 2.7% of the EPA limit 4000 µg/L
worst single sample: 110 µg/L | 7/8 | SYR4 | 2012–2019 |
| Barium | 56.6 µg/L 2.8% of the EPA limit 2000 µg/L
worst single sample: 57 µg/L | 5/8 | SYR4 | 2012–2019 |
| Dalapon | 38.0848 µg/L 19% of the EPA limit 200 µg/L
worst single sample: 38.27 µg/L | 5/13 | SYR4 | 2012–2019 |
| Atrazine | 0.4995 µg/L 17% of the EPA limit 3 µg/L
worst single sample: 0.5100 µg/L | 4/16 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 1.1465 µg/L 19% of the EPA limit 6 µg/L
worst single sample: 1.25 µg/L | 4/16 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 3.06 pCi/L No EPA limit set
worst single sample: 3.09 pCi/L | 3/7 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 0.7492 pCi/L 15% of the EPA limit 5 pCi/L
worst single sample: 0.7640 pCi/L | 2/5 | SYR4 | 2015–2019 |
| Arsenic | 2.6 µg/L 26% of the EPA limit 10 µg/L | 1/8 | SYR4 | 2012–2019 |
| Cyanide | 5.4 µg/L 2.7% of the EPA limit 200 µg/L | 1/8 | SYR4 | 2012–2019 |
| Hexachlorocyclopentadiene | 0.1600 µg/L 0.3% of the EPA limit 50 µg/L | 1/16 | SYR4 | 2012–2019 |
| Selenium | 0.6200 µg/L 1.2% of the EPA limit 50 µg/L | 1/8 | SYR4 | 2012–2019 |
| Xylenes, Total | 0.7600 µg/L 0% of the EPA limit 10000 µg/L | 1/8 | SYR4 | 2012–2019 |
| Lithium | 11 µg/L No EPA limit set | 1/4 | UCMR-5 | 2024 |
84 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about St Mary Water & Sewer Comm #3
Is St Mary Water & Sewer Comm #3 tap water safe to drink?
EPA monitoring detected 28 contaminants in St Mary Water & Sewer Comm #3'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 St Mary Water & Sewer Comm #3's water?
EPA monitoring detected Bromodichloromethane, Chloroform, TTHM, Copper, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.
How many people does St Mary Water & Sewer Comm #3 serve?
St Mary Water & Sewer Comm #3 reports serving 7,828 people in Louisiana, per its EPA record.
Has St Mary Water & Sewer Comm #3 had any water quality violations?
The EPA has 36 violations on file for St Mary Water & Sewer Comm #3, of which 24 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.