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.
7
health-based violations
7
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2010-06-01 → 2010-06-30 |
| MCL | Health-based | Resolved | 2010-06-01 → 2010-06-30 |
| MCL | Health-based | Resolved | 2010-06-01 → 2010-06-30 |
| MCL | Health-based | Resolved | 2010-06-01 → 2010-06-30 |
| MCL | Health-based | Archived | 1992-04-15 → 1992-05-14 |
| MCL | Health-based | Archived | 1992-04-15 → 1992-05-14 |
| MCL | Health-based | Archived | 1992-04-15 → 1992-05-14 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| Pfba | 0.0136 µg/L | 7/8 | 2023 |
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: 26 µg/L | 153/153 | SYR4 | 2012–2019 |
| Chloroform | 64.58 µg/L No EPA limit set
worst single sample: 68 µg/L | 153/153 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 32.54 µg/L No EPA limit set
worst single sample: 40 µg/L | 149/149 | SYR4 | 2012–2019 |
| TTHM | 80.84 µg/L 101% of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 89.4 µg/L | 149/149 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 65.36 µg/L 109% of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 91.5 µg/L | 149/149 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 28.6 µg/L No EPA limit set
worst single sample: 48 µg/L | 149/149 | SYR4 | 2012–2019 |
| Dibromochloromethane | 9.2 µg/L No EPA limit set
worst single sample: 12 µg/L | 145/153 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 3.9 µg/L No EPA limit set
worst single sample: 5.5 µg/L | 101/149 | SYR4 | 2012–2019 |
| Copper | 340 µg/L 26% of the EPA limit 1300 µg/L
worst single sample: 700 µg/L | 93/126 | SYR4 | 2014–2019 |
| Monochloroacetic Acid | 5.41 µg/L No EPA limit set
worst single sample: 10 µg/L | 64/149 | SYR4 | 2012–2019 |
| Lead | 4 µg/L 27% of the EPA limit 15 µg/L
worst single sample: 19 µg/L | 50/126 | SYR4 | 2014–2019 |
| Nitrate-Nitrite | 2000 µg/L 20% of the EPA limit 10000 µg/L | 18/18 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 11 µg/L No EPA limit set
worst single sample: 14.6 µg/L | 17/149 | SYR4 | 2012–2019 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L | 11/11 | LCR | 2023 |
| Bromoform | 0.9440 µg/L No EPA limit set
worst single sample: 1 µg/L | 9/153 | SYR4 | 2012–2019 |
| Fluoride | 940 µg/L 24% of the EPA limit 4000 µg/L
worst single sample: 1000 µg/L | 9/9 | SYR4 | 2012–2019 |
| Arsenic | 1.24 µg/L 12% of the EPA limit 10 µg/L
worst single sample: 1.3 µg/L | 7/9 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 1.111 µg/L 19% of the EPA limit 6 µg/L
worst single sample: 1.3 µg/L | 7/18 | SYR4 | 2012–2019 |
| Barium | 57.75 µg/L 2.9% of the EPA limit 2000 µg/L
worst single sample: 58 µg/L | 6/9 | SYR4 | 2012–2019 |
| Dalapon | 33.9575 µg/L 17% of the EPA limit 200 µg/L
worst single sample: 37.35 µg/L | 6/15 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 2.909 pCi/L No EPA limit set
worst single sample: 2.99 pCi/L | 4/9 | SYR4 | 2012–2019 |
| Lithium | 15 µg/L No EPA limit set | 4/8 | UCMR-5 | 2023 |
| Combined Uranium | 1.439 µg/L 4.8% of the EPA limit 30 µg/L
worst single sample: 1.49 µg/L | 3/5 | SYR4 | 2012–2017 |
| Carbon Tetrachloride | 0.5100 µg/L 10% of the EPA limit 5 µg/L | 1/12 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 0.7270 pCi/L 15% of the EPA limit 5 pCi/L | 1/6 | SYR4 | 2015–2019 |
| Selenium | 0.5500 µg/L 1.1% of the EPA limit 50 µg/L | 1/9 | SYR4 | 2012–2019 |
| Simazine | 0.6600 µg/L 17% of the EPA limit 4 µg/L | 1/18 | SYR4 | 2012–2019 |
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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranChlordaneChromiumDichloromethaneDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about St Charles Parish Dept of Waterworks
Is St Charles Parish Dept of Waterworks tap water safe to drink?
EPA monitoring detected 28 contaminants in St Charles Parish Dept of Waterworks'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 Charles Parish Dept of Waterworks's water?
EPA monitoring detected Bromodichloromethane, Chloroform, Dichloroacetic Acid, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.
How many people does St Charles Parish Dept of Waterworks serve?
St Charles Parish Dept of Waterworks reports serving 52,879 people in Louisiana, per its EPA record.
Has St Charles Parish Dept of Waterworks had any water quality violations?
The EPA has 7 violations on file for St Charles Parish Dept of Waterworks, of which 7 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.