Tap WaterIndex

← Louisiana

Tap water quality report

Southwest Ouachita Waterworks, Inc

EPA monitoring tested this supplier for 110 contaminants and detected 23. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

110
contaminants tested
23
detected
10,725
people served
408
health-based violations
Louisiana rankingsLead in LouisianaPFAS in Louisiana
Water source
Ground water
Ownership
Private
Counties served
Ouachita 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.

408
health-based violations
418
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2024-10-01 → 2024-12-31
MCL Health-based Archived 2024-10-01 → 2024-12-31
MCL Health-based Archived 2024-10-01 → 2024-12-31
MCL Health-based Archived 2024-07-01 → 2024-09-30
MCL Health-based Archived 2024-07-01 → 2024-09-30
MCL Health-based Archived 2024-07-01 → 2024-09-30
MCL Health-based Archived 2024-04-01 → 2024-06-30
MCL Health-based Archived 2024-04-01 → 2024-06-30
MCL Health-based Archived 2024-04-01 → 2024-06-30
MCL Health-based Archived 2024-01-01 → 2024-03-31

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
TTHM
282.51 µg/L 353%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 298.4 µg/L
55/56 SYR4 2013–2019
Copper
600 µg/L 46%
of the EPA limit 1300 µg/L
worst single sample: 800 µg/L
54/76 SYR4 2013–2019
Chloroform
91.94 µg/L
No EPA limit set
worst single sample: 164 µg/L
53/56 SYR4 2013–2019
Dibromoacetic Acid
19.89 µg/L
No EPA limit set
worst single sample: 21.6 µg/L
52/56 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
77.96 µg/L 130%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 169.4 µg/L
52/56 SYR4 2013–2019
Trichloroacetic Acid
35.45 µg/L
No EPA limit set
worst single sample: 89.8 µg/L
52/56 SYR4 2013–2019
Dibromochloromethane
102 µg/L
No EPA limit set
worst single sample: 114 µg/L
51/56 SYR4 2013–2019
Bromodichloromethane
98.385 µg/L
No EPA limit set
worst single sample: 103 µg/L
50/56 SYR4 2013–2019
Dichloroacetic Acid
33.665 µg/L
No EPA limit set
worst single sample: 77.8 µg/L
50/56 SYR4 2013–2019
Bromoform
50.48 µg/L
No EPA limit set
worst single sample: 78.8 µg/L
49/56 SYR4 2013–2019
Lead
9 µg/L 60%
of the EPA limit 15 µg/L
worst single sample: 17 µg/L
45/76 SYR4 2013–2019
Nitrate-Nitrite
38.85 µg/L 0.4%
of the EPA limit 10000 µg/L
worst single sample: 39 µg/L
24/114 SYR4 2012–2019
Monobromoacetic Acid
5.84 µg/L
No EPA limit set
worst single sample: 7.1 µg/L
19/56 SYR4 2013–2019
Fluoride
1600 µg/L 40%
of the EPA limit 4000 µg/L
 15/15 SYR4 2012–2017
Monochloroacetic Acid
4.73 µg/L
No EPA limit set
worst single sample: 7.2 µg/L
14/56 SYR4 2013–2019
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2025
Di(2-ethylhexyl) Phthalate
0.8760 µg/L 15%
of the EPA limit 6 µg/L
worst single sample: 0.9600 µg/L
8/15 SYR4 2012–2017
Lithium
10.9 µg/L
No EPA limit set
 8/12 UCMR-5 2024
Barium
19.3 µg/L 1%
of the EPA limit 2000 µg/L
worst single sample: 22 µg/L
7/15 SYR4 2012–2017
Dalapon
1.72 µg/L 0.9%
of the EPA limit 200 µg/L
 6/17 SYR4 2012–2017
Arsenic
0.9795 µg/L 9.8%
of the EPA limit 10 µg/L
worst single sample: 1 µg/L
2/15 SYR4 2012–2017
Combined Radium (-226 And -228)
0.7284 pCi/L 15%
of the EPA limit 5 pCi/L
worst single sample: 0.7350 pCi/L
2/7 SYR4 2017
Gross Beta Particle Activity
2.1545 pCi/L
No EPA limit set
worst single sample: 2.19 pCi/L
2/14 SYR4 2012–2017
87 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-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
KELLEY, WALTER L
Phone
318-325-3371
Email
[email protected]

Frequently asked questions about Southwest Ouachita Waterworks, Inc

Is Southwest Ouachita Waterworks, Inc tap water safe to drink?

EPA monitoring detected 23 contaminants in Southwest Ouachita Waterworks, Inc'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 Southwest Ouachita Waterworks, Inc's water?

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

How many people does Southwest Ouachita Waterworks, Inc serve?

Southwest Ouachita Waterworks, Inc reports serving 10,725 people in Louisiana, per its EPA record.

Has Southwest Ouachita Waterworks, Inc had any water quality violations?

The EPA has 418 violations on file for Southwest Ouachita Waterworks, Inc, of which 408 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.