Is City of Opelousas Water Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: St. Landry 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

110

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2025-04-02
TT	Health-based	Resolved	2025-04-02
TT	Health-based	Resolved	2025-04-02
TT	Health-based	Resolved	2025-04-02
TT	Health-based	Resolved	2024-06-04
TT	Health-based	Resolved	2024-06-04
TT	Health-based	Resolved	2024-06-04
TT	Health-based	Resolved	2024-06-04
TT	Health-based	Resolved	2021-10-27
TT	Health-based	Resolved	2021-10-27

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
TTHM	28.74 µg/L 36% of the EPA limit 80 µg/L worst single sample: 42.6 µg/L	109/110	SYR4	2012–2019
Bromodichloromethane	9.33 µg/L No EPA limit set worst single sample: 13.9 µg/L	108/110	SYR4	2012–2019
Chloroform	9.7 µg/L No EPA limit set worst single sample: 16.3 µg/L	108/110	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	10.7 µg/L 18% of the EPA limit 60 µg/L worst single sample: 16.2 µg/L	108/110	SYR4	2012–2019
Trichloroacetic Acid	3.5 µg/L No EPA limit set worst single sample: 5.1 µg/L	108/110	SYR4	2012–2019
Dibromochloromethane	8.1 µg/L No EPA limit set worst single sample: 10.4 µg/L	106/110	SYR4	2012–2019
Dibromoacetic Acid	2.585 µg/L No EPA limit set worst single sample: 3.4 µg/L	104/110	SYR4	2012–2019
Dichloroacetic Acid	5.185 µg/L No EPA limit set worst single sample: 8 µg/L	104/110	SYR4	2012–2019
Bromoform	2.06 µg/L No EPA limit set worst single sample: 2.5 µg/L	75/110	SYR4	2012–2019
Copper	300 µg/L 23% of the EPA limit 1300 µg/L worst single sample: 400 µg/L	37/74	SYR4	2014–2018
Fluoride	411 µg/L 10% of the EPA limit 4000 µg/L worst single sample: 510 µg/L	19/19	SYR4	2012–2018
Monochloroacetic Acid	4.7 µg/L No EPA limit set worst single sample: 5 µg/L	13/110	SYR4	2012–2019
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L	11/11	LCR	2023
Arsenic	8.8 µg/L 88% of the EPA limit 10 µg/L worst single sample: 10 µg/L	9/25	SYR4	2012–2019
Barium	228 µg/L 11% of the EPA limit 2000 µg/L worst single sample: 230 µg/L	5/19	SYR4	2012–2018
Di(2-ethylhexyl) Phthalate	0.7060 µg/L 12% of the EPA limit 6 µg/L worst single sample: 0.7100 µg/L	5/18	SYR4	2012–2018
Gross Beta Particle Activity	2.762 pCi/L No EPA limit set worst single sample: 2.79 pCi/L	5/18	SYR4	2012–2018
Lead	1 µg/L 6.7% of the EPA limit 15 µg/L	5/74	SYR4	2014–2018
Monobromoacetic Acid	0.8880 µg/L No EPA limit set worst single sample: 0.9100 µg/L	5/110	SYR4	2012–2019
P-Dichlorobenzene	1.002 µg/L 1.3% of the EPA limit 75 µg/L worst single sample: 1.03 µg/L	5/18	SYR4	2012–2018
Combined Radium (-226 And -228)	1.73075 pCi/L 35% of the EPA limit 5 pCi/L worst single sample: 1.88 pCi/L	4/6	SYR4	2017–2018
Nitrate-Nitrite	200 µg/L 2% of the EPA limit 10000 µg/L	4/66	SYR4	2012–2019
Lithium	29.8 µg/L No EPA limit set	2/2	UCMR-5	2025
Antimony, Total	1 µg/L 17% of the EPA limit 6 µg/L	1/19	SYR4	2012–2018
Combined Uranium	1.49 µg/L 5% of the EPA limit 30 µg/L	1/14	SYR4	2012–2018

85 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: ALSANDOR, JULIUS
Phone: 337-948-2520
Email: [email protected]

Frequently asked questions about City of Opelousas Water

Is City of Opelousas Water tap water safe to drink?

EPA monitoring detected 25 contaminants in City of Opelousas 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 City of Opelousas Water's water?

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

How many people does City of Opelousas Water serve?

City of Opelousas Water reports serving 20,388 people in Louisiana, per its EPA record.

Has City of Opelousas Water had any water quality violations?

The EPA has 110 violations on file for City of Opelousas Water, of which 84 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.