Is St John Water District 3 Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: St. John the Baptist Parish

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2015-08-01 → 2015-08-31
MCL	Health-based	Resolved	2015-08-01 → 2015-08-31
MCL	Health-based	Resolved	2015-08-01 → 2015-08-31
MCL	Health-based	Resolved	2015-08-01 → 2015-08-31
MR	Monitoring	Resolved	2018-01-12
MR	Monitoring	Resolved	2018-01-12
Other	Monitoring	Resolved	2017-07-01
Other	Monitoring	Resolved	2017-07-01

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	4.67 µg/L No EPA limit set worst single sample: 44.7 µg/L	87/88	SYR4	2014–2019
TTHM	4.67 µg/L 5.8% of the EPA limit 80 µg/L worst single sample: 73.4 µg/L	87/88	SYR4	2014–2019
Dichloroacetic Acid	11.025 µg/L No EPA limit set worst single sample: 14.9 µg/L	26/88	SYR4	2014–2019
Total Haloacetic Acids (HAA5)	20.325 µg/L 34% of the EPA limit 60 µg/L worst single sample: 26.5 µg/L	26/88	SYR4	2014–2019
Lead	9.39 µg/L 63% of the EPA limit 15 µg/L worst single sample: 11 µg/L	15/66	SYR4	2014–2018
Dibromoacetic Acid	1.75 µg/L No EPA limit set worst single sample: 1.8 µg/L	6/88	SYR4	2014–2019
Barium	37.8 µg/L 1.9% of the EPA limit 2000 µg/L worst single sample: 38 µg/L	5/6	SYR4	2016–2018
Copper	326.2 µg/L 25% of the EPA limit 1300 µg/L worst single sample: 400 µg/L	5/66	SYR4	2014–2018
Arsenic	1.37 µg/L 14% of the EPA limit 10 µg/L worst single sample: 1.4 µg/L	4/6	SYR4	2016–2018
Bromodichloromethane	22.09 µg/L No EPA limit set worst single sample: 23.8 µg/L	4/88	SYR4	2014–2019
Fluoride	807 µg/L 20% of the EPA limit 4000 µg/L worst single sample: 810 µg/L	4/4	SYR4	2016–2018
Lead	0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L	4/4	LCR	2023
Trichloroacetic Acid	8.025 µg/L No EPA limit set worst single sample: 8.1 µg/L	4/88	SYR4	2014–2019
Dibromochloromethane	7.01 µg/L No EPA limit set worst single sample: 7.5 µg/L	3/88	SYR4	2014–2019
Combined Radium (-226 And -228)	1.0839 pCi/L 22% of the EPA limit 5 pCi/L worst single sample: 1.1 pCi/L	2/4	SYR4	2016–2018
Di(2-ethylhexyl) Phthalate	0.5095 µg/L 8.5% of the EPA limit 6 µg/L worst single sample: 0.5100 µg/L	2/4	SYR4	2016–2018
Nitrate-Nitrite	73 µg/L 0.7% of the EPA limit 10000 µg/L	2/14	SYR4	2015–2019
Gross Beta Particle Activity	1.66 pCi/L No EPA limit set	1/4	SYR4	2016–2018
Monochloroacetic Acid	2.9 µg/L No EPA limit set	1/88	SYR4	2014–2019

92 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, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: HOTARD, JACLYN
Phone: 985-652-9569
Email: [email protected]

Frequently asked questions about St John Water District 3

Is St John Water District 3 tap water safe to drink?

EPA monitoring detected 19 contaminants in St John Water District 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 John Water District 3's water?

EPA monitoring detected Chloroform, TTHM, Dichloroacetic Acid, Total Haloacetic Acids (HAA5), Lead, and others. The full list with the level and data source for each is above.

How many people does St John Water District 3 serve?

St John Water District 3 reports serving 31,965 people in Louisiana, per its EPA record.

Has St John Water District 3 had any water quality violations?

The EPA has 8 violations on file for St John Water District 3, of which 4 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.