Is Slidell Water Supply Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: St. Tammany 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	2022-09-01 → 2022-09-30
MCL	Health-based	Resolved	2022-09-01 → 2022-09-30
MCL	Health-based	Resolved	2022-09-01 → 2022-09-30
MCL	Health-based	Resolved	2022-09-01 → 2022-09-30
MCL	Health-based	Resolved	2015-06-01 → 2015-06-30
MCL	Health-based	Resolved	2015-06-01 → 2015-06-30
MCL	Health-based	Resolved	2015-06-01 → 2015-06-30
MCL	Health-based	Resolved	2015-06-01 → 2015-06-30
MCL	Health-based	Resolved	2015-06-01 → 2015-06-30
MCL	Health-based	Resolved	2015-06-01 → 2015-06-30

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
Chloroform	17 µg/L No EPA limit set worst single sample: 22.2 µg/L	107/111	SYR4	2012–2019
TTHM	20.24 µg/L 25% of the EPA limit 80 µg/L worst single sample: 28 µg/L	107/111	SYR4	2012–2019
Dichloroacetic Acid	6.775 µg/L No EPA limit set worst single sample: 8.4 µg/L	106/111	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	10.8 µg/L 18% of the EPA limit 60 µg/L worst single sample: 17.3 µg/L	106/111	SYR4	2012–2019
Lead	4 µg/L 27% of the EPA limit 15 µg/L worst single sample: 16 µg/L	66/158	SYR4	2014–2019
Copper	200 µg/L 15% of the EPA limit 1300 µg/L worst single sample: 1100 µg/L	61/158	SYR4	2014–2019
Trichloroacetic Acid	4.76 µg/L No EPA limit set worst single sample: 5.4 µg/L	58/111	SYR4	2012–2019
Bromodichloromethane	5.15 µg/L No EPA limit set worst single sample: 7.9 µg/L	38/111	SYR4	2012–2019
Lithium	17.3 µg/L No EPA limit set	14/14	UCMR-5	2025
Fluoride	370 µg/L 9.3% of the EPA limit 4000 µg/L	12/12	SYR4	2013–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	12/12	LCR	2024
Dibromochloromethane	4.32 µg/L No EPA limit set worst single sample: 4.5 µg/L	10/111	SYR4	2012–2019
Nitrate-Nitrite	39 µg/L 0.4% of the EPA limit 10000 µg/L	10/72	SYR4	2012–2019
Di(2-ethylhexyl) Phthalate	10.212 µg/L 170% of the EPA limit, at the 95th percentile of samples — 6 µg/L worst single sample: 12.6 µg/L	5/12	SYR4	2013–2019
Barium	14.7 µg/L 0.7% of the EPA limit 2000 µg/L worst single sample: 15 µg/L	4/12	SYR4	2013–2019
Dalapon	3.765 µg/L 1.9% of the EPA limit 200 µg/L	4/12	SYR4	2013–2019
Monochloroacetic Acid	6.768 µg/L No EPA limit set worst single sample: 7.8 µg/L	4/111	SYR4	2012–2019
Selenium	1.498 µg/L 3% of the EPA limit 50 µg/L worst single sample: 1.6 µg/L	4/12	SYR4	2013–2019
Combined Radium (-226 And -228)	0.6817 pCi/L 14% of the EPA limit 5 pCi/L worst single sample: 0.7120 pCi/L	3/8	SYR4	2016–2019
Dibromoacetic Acid	1.6 µg/L No EPA limit set	3/111	SYR4	2012–2019
Dichloromethane	1.2 µg/L 24% of the EPA limit 5 µg/L	1/12	SYR4	2013–2019
Di(2-ethylhexyl) Adipate	0.5600 µg/L 0.1% of the EPA limit 400 µg/L	1/10	SYR4	2013–2019
Gross Alpha, Excl. Radon And U	3.07 pCi/L 20% of the EPA limit 15 pCi/L	1/8	SYR4	2013–2016
Gross Beta Particle Activity	2.05 pCi/L No EPA limit set	1/12	SYR4	2013–2019

88 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, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: FANDAL, RANDY
Phone: 985-646-4333
Email: [email protected]

Frequently asked questions about Slidell Water Supply

Is Slidell Water Supply tap water safe to drink?

EPA monitoring detected 24 contaminants in Slidell Water Supply'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 Slidell Water Supply'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 Slidell Water Supply serve?

Slidell Water Supply reports serving 35,547 people in Louisiana, per its EPA record.

Has Slidell Water Supply had any water quality violations?

The EPA has 91 violations on file for Slidell Water Supply, of which 74 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.