Is St Marys Water Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Private
Counties served: Bossier 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.

149

health-based violations

243

violations on file

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
TT	Health-based	Addressed	2024-10-17
TT	Health-based	Addressed	2023-03-23
TT	Health-based	Addressed	2023-03-23
TT	Health-based	Addressed	2023-03-23
TT	Health-based	Addressed	2023-03-23
TT	Health-based	Addressed	2023-03-23

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	24.205 µg/L No EPA limit set worst single sample: 32 µg/L	54/54	SYR4	2012–2019
Bromoform	38.4 µg/L No EPA limit set worst single sample: 50.5 µg/L	54/54	SYR4	2012–2019
Chloroform	9.935 µg/L No EPA limit set worst single sample: 12 µg/L	54/54	SYR4	2012–2019
Dibromochloromethane	48.14 µg/L No EPA limit set worst single sample: 52.3 µg/L	54/54	SYR4	2012–2019
TTHM	104.6 µg/L 131% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 114.2 µg/L	54/54	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	65.77 µg/L 110% of the EPA limit, at the 95th percentile of samples — 60 µg/L worst single sample: 171.4 µg/L	54/54	SYR4	2012–2019
Trichloroacetic Acid	10.4 µg/L No EPA limit set worst single sample: 99 µg/L	53/54	SYR4	2012–2019
Dibromoacetic Acid	13.8 µg/L No EPA limit set worst single sample: 15.3 µg/L	49/54	SYR4	2012–2019
Dichloroacetic Acid	6.8 µg/L No EPA limit set worst single sample: 65 µg/L	49/54	SYR4	2012–2019
Monobromoacetic Acid	2.54 µg/L No EPA limit set worst single sample: 3.1 µg/L	17/54	SYR4	2012–2019
Lead	10.8 µg/L 72% of the EPA limit 15 µg/L worst single sample: 22 µg/L	15/20	SYR4	2012–2019
Lead	0.0030 mg/L 20% of the EPA limit 0.0150 mg/L	11/11	LCR	2024
Copper	395 µg/L 30% of the EPA limit 1300 µg/L worst single sample: 500 µg/L	8/20	SYR4	2012–2019
Monochloroacetic Acid	60.13 µg/L No EPA limit set worst single sample: 70 µg/L	8/54	SYR4	2012–2019
Fluoride	600 µg/L 15% of the EPA limit 4000 µg/L	6/6	SYR4	2012–2019
Nitrate-Nitrite	38 µg/L 0.4% of the EPA limit 10000 µg/L	6/26	SYR4	2012–2019
Gross Beta Particle Activity	3.824 pCi/L No EPA limit set worst single sample: 4 pCi/L	5/6	SYR4	2012–2019
Barium	150 µg/L 7.5% of the EPA limit 2000 µg/L	4/6	SYR4	2012–2019
Combined Radium (-226 And -228)	0.7021 pCi/L 14% of the EPA limit 5 pCi/L worst single sample: 0.7090 pCi/L	3/4	SYR4	2016–2019
Di(2-ethylhexyl) Phthalate	4.497 µg/L 75% of the EPA limit 6 µg/L worst single sample: 4.63 µg/L	3/7	SYR4	2012–2019
Arsenic	1 µg/L 10% of the EPA limit 10 µg/L	1/6	SYR4	2012–2019

59 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: HAYS, DENNIS
Phone: 318-326-5808
Email: [email protected]

Frequently asked questions about St Marys Water

Is St Marys Water tap water safe to drink?

EPA monitoring detected 21 contaminants in St Marys Water'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 Marys Water's water?

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

How many people does St Marys Water serve?

St Marys Water reports serving 294 people in Louisiana, per its EPA record.

Has St Marys Water had any water quality violations?

The EPA has 243 violations on file for St Marys Water, of which 149 are health-based (a contaminant limit or required treatment was breached) and 30 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.