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.
440
health-based violations
485
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| TT | Health-based | Resolved | 2019-06-01 → 2019-06-30 |
| TT | Health-based | Resolved | 2019-06-01 → 2019-06-30 |
| TT | Health-based | Resolved | 2019-06-01 → 2019-06-30 |
| TT | Health-based | Resolved | 2019-06-01 → 2019-06-30 |
| TT | Health-based | Resolved | 2015-11-01 → 2015-11-30 |
| TT | Health-based | Resolved | 2015-11-01 → 2015-11-30 |
| TT | Health-based | Resolved | 2015-11-01 → 2015-11-30 |
| TT | Health-based | Resolved | 2015-11-01 → 2015-11-30 |
| TT | Health-based | Resolved | 2015-10-01 → 2015-10-31 |
| TT | Health-based | Resolved | 2015-10-01 → 2015-10-31 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| Pfba | 0.0060 µg/L | 1/3 | 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 |
|---|---|---|---|---|
| Chloroform | 66.065 µg/L No EPA limit set
worst single sample: 122 µg/L | 168/169 | SYR4 | 2012–2019 |
| TTHM | 95.655 µg/L 120% of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 189.5 µg/L | 164/165 | SYR4 | 2012–2019 |
| Bromodichloromethane | 33.155 µg/L No EPA limit set
worst single sample: 51.1 µg/L | 140/169 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 60.84 µg/L 101% of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 76.8 µg/L | 139/165 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 34.9 µg/L No EPA limit set
worst single sample: 43.1 µg/L | 137/165 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 21.045 µg/L No EPA limit set
worst single sample: 25.6 µg/L | 132/165 | SYR4 | 2012–2019 |
| Dibromochloromethane | 10.9 µg/L No EPA limit set
worst single sample: 16.4 µg/L | 121/169 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 4.11 µg/L No EPA limit set
worst single sample: 8.1 µg/L | 95/165 | SYR4 | 2012–2019 |
| Copper | 895 µg/L 69% of the EPA limit 1300 µg/L
worst single sample: 1200 µg/L | 82/95 | SYR4 | 2014–2019 |
| Monochloroacetic Acid | 7.34 µg/L No EPA limit set
worst single sample: 25.6 µg/L | 73/165 | SYR4 | 2012–2019 |
| Lead | 3.1 µg/L 21% of the EPA limit 15 µg/L
worst single sample: 7 µg/L | 59/95 | SYR4 | 2014–2019 |
| Nitrate-Nitrite | 2000 µg/L 20% of the EPA limit 10000 µg/L | 16/24 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 2.81 µg/L No EPA limit set
worst single sample: 3.8 µg/L | 12/165 | SYR4 | 2012–2019 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L | 11/11 | LCR | 2024 |
| Fluoride | 855 µg/L 21% of the EPA limit 4000 µg/L
worst single sample: 900 µg/L | 10/10 | SYR4 | 2012–2019 |
| Arsenic | 1.68 µg/L 17% of the EPA limit 10 µg/L
worst single sample: 2 µg/L | 9/10 | SYR4 | 2012–2019 |
| Bromoform | 2.008 µg/L No EPA limit set
worst single sample: 2.7 µg/L | 9/169 | SYR4 | 2012–2019 |
| Dalapon | 32.6005 µg/L 16% of the EPA limit 200 µg/L
worst single sample: 37.35 µg/L | 8/16 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 1.1575 µg/L 19% of the EPA limit 6 µg/L
worst single sample: 1.28 µg/L | 8/18 | SYR4 | 2012–2019 |
| Barium | 58.4 µg/L 2.9% of the EPA limit 2000 µg/L
worst single sample: 60 µg/L | 5/10 | SYR4 | 2012–2019 |
| Atrazine | 0.4330 µg/L 14% of the EPA limit 3 µg/L
worst single sample: 0.4400 µg/L | 2/18 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 0.8490 pCi/L 17% of the EPA limit 5 pCi/L
worst single sample: 0.8530 pCi/L | 2/5 | SYR4 | 2015–2019 |
| Gross Beta Particle Activity | 2.0875 pCi/L No EPA limit set
worst single sample: 2.1 pCi/L | 2/10 | SYR4 | 2012–2019 |
| Selenium | 0.6455 µg/L 1.3% of the EPA limit 50 µg/L
worst single sample: 0.6500 µg/L | 2/10 | SYR4 | 2012–2019 |
| Simazine | 0.6895 µg/L 17% of the EPA limit 4 µg/L
worst single sample: 0.6900 µg/L | 2/18 | SYR4 | 2012–2019 |
| 1,2-Dichloroethane | 0.6000 µg/L 12% of the EPA limit 5 µg/L | 1/11 | SYR4 | 2012–2019 |
| Carbon Tetrachloride | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/11 | SYR4 | 2012–2019 |
| Combined Uranium | 0.5800 µg/L 1.9% of the EPA limit 30 µg/L | 1/7 | SYR4 | 2012–2017 |
| Lithium | 10.3 µg/L No EPA limit set | 1/3 | UCMR-5 | 2025 |
82 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosBhc-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 John Water District 1
Is St John Water District 1 tap water safe to drink?
EPA monitoring detected 30 contaminants in St John Water District 1'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 John Water District 1's water?
EPA monitoring detected Chloroform, TTHM, Bromodichloromethane, Total Haloacetic Acids (HAA5), Dichloroacetic Acid, and others. The full list with the level and data source for each is above.
How many people does St John Water District 1 serve?
St John Water District 1 reports serving 10,484 people in Louisiana, per its EPA record.
Has St John Water District 1 had any water quality violations?
The EPA has 485 violations on file for St John Water District 1, of which 440 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.