Is Lake St John Waterworks District 1 Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Concordia 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.

656

health-based violations

723

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2023-10-01 → 2023-12-31
MCL	Health-based	Resolved	2023-10-01 → 2023-12-31
MCL	Health-based	Resolved	2023-10-01 → 2023-12-31
MCL	Health-based	Resolved	2023-10-01 → 2023-12-31
MCL	Health-based	Resolved	2023-10-01 → 2023-12-31
MCL	Health-based	Resolved	2023-07-01 → 2023-09-30
MCL	Health-based	Resolved	2023-07-01 → 2023-09-30
MCL	Health-based	Resolved	2023-07-01 → 2023-09-30
MCL	Health-based	Resolved	2023-07-01 → 2023-09-30
MCL	Health-based	Resolved	2023-07-01 → 2023-09-30

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	20.41 µg/L No EPA limit set worst single sample: 22.3 µg/L	60/60	SYR4	2012–2019
Chloroform	90.005 µg/L No EPA limit set worst single sample: 115 µg/L	60/60	SYR4	2012–2019
TTHM	113.37 µg/L 142% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 140.2 µg/L	60/60	SYR4	2012–2019
Dibromochloromethane	3.664 µg/L No EPA limit set worst single sample: 4.31 µg/L	59/60	SYR4	2012–2019
Dichloroacetic Acid	39.54 µg/L No EPA limit set worst single sample: 50.5 µg/L	59/60	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	99.39 µg/L 166% of the EPA limit, at the 95th percentile of samples — 60 µg/L worst single sample: 129.8 µg/L	59/60	SYR4	2012–2019
Trichloroacetic Acid	67.48 µg/L No EPA limit set worst single sample: 79.3 µg/L	59/60	SYR4	2012–2019
Lead	3 µg/L 20% of the EPA limit 15 µg/L	20/34	SYR4	2012–2019
Dibromoacetic Acid	1.2 µg/L No EPA limit set	15/60	SYR4	2012–2019
Copper	335 µg/L 26% of the EPA limit 1300 µg/L worst single sample: 400 µg/L	14/34	SYR4	2012–2019
Monochloroacetic Acid	4.46 µg/L No EPA limit set worst single sample: 4.5 µg/L	9/60	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	8/8	LCR	2024
Fluoride	1300 µg/L 33% of the EPA limit 4000 µg/L	6/6	SYR4	2013–2019
Monobromoacetic Acid	7.307 µg/L No EPA limit set worst single sample: 7.46 µg/L	4/60	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	3.541 pCi/L 24% of the EPA limit 15 pCi/L worst single sample: 3.57 pCi/L	3/4	SYR4	2013–2016
Barium	10.89 µg/L 0.5% of the EPA limit 2000 µg/L worst single sample: 11 µg/L	2/6	SYR4	2013–2019
Di(2-ethylhexyl) Phthalate	0.7595 µg/L 13% of the EPA limit 6 µg/L worst single sample: 0.7700 µg/L	2/6	SYR4	2013–2019
Combined Radium (-226 And -228)	0.3050 pCi/L 6.1% of the EPA limit 5 pCi/L	1/4	SYR4	2016–2019
Gross Beta Particle Activity	1.93 pCi/L No EPA limit set	1/9	SYR4	2012–2019

63 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitrate-NitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: MCCARTNEY, JAMIE
Phone: 318-757-3853
Email: lsjwaterworks@yahoo.com

Frequently asked questions about Lake St John Waterworks District 1

Is Lake St John Waterworks District 1 tap water safe to drink?

EPA monitoring detected 19 contaminants in Lake St John Waterworks 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 Lake St John Waterworks District 1's water?

EPA monitoring detected Bromodichloromethane, Chloroform, TTHM, Dibromochloromethane, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Lake St John Waterworks District 1 serve?

Lake St John Waterworks District 1 reports serving 2,067 people in Louisiana, per its EPA record.

Has Lake St John Waterworks District 1 had any water quality violations?

The EPA has 723 violations on file for Lake St John Waterworks District 1, of which 656 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.