Is The Oaks Wsc Tap Water Safe? Quality Report

Water source: SWP
Ownership: Local government
Counties served: Bexar

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
Other	Monitoring	Resolved	2025-07-01
Other	Monitoring	Resolved	2025-07-01

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
Nitrate	2854 µg/L 29% of the EPA limit 10000 µg/L worst single sample: 4400 µg/L	64/64	SYR4	2012–2019
Bromoform	6.74 µg/L No EPA limit set worst single sample: 7.8 µg/L	33/33	SYR4	2013–2019
Dibromochloromethane	15.74 µg/L No EPA limit set worst single sample: 15.9 µg/L	33/33	SYR4	2013–2019
Bromodichloromethane	11.935 µg/L No EPA limit set worst single sample: 28.5 µg/L	32/33	SYR4	2013–2019
Copper	217.4 µg/L 17% of the EPA limit 1300 µg/L worst single sample: 224 µg/L	22/25	SYR4	2012–2018
Chloroform	9.74 µg/L No EPA limit set worst single sample: 26.6 µg/L	22/33	SYR4	2013–2019
Lead	2.6 µg/L 17% of the EPA limit 15 µg/L worst single sample: 3 µg/L	17/25	SYR4	2012–2018
Fluoride	527 µg/L 13% of the EPA limit 4000 µg/L worst single sample: 560 µg/L	12/12	SYR4	2012–2018
Nitrate-Nitrite	2655 µg/L 27% of the EPA limit 10000 µg/L worst single sample: 2820 µg/L	12/12	SYR4	2013–2019
Dibromoacetic Acid	5.755 µg/L No EPA limit set worst single sample: 5.8 µg/L	10/10	SYR4	2013–2019
TTHM	59.91 µg/L 75% of the EPA limit 80 µg/L worst single sample: 73.5 µg/L	10/10	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	12.27 µg/L 20% of the EPA limit 60 µg/L worst single sample: 12.9 µg/L	10/10	SYR4	2013–2019
Barium	46.16 µg/L 2.3% of the EPA limit 2000 µg/L worst single sample: 46.6 µg/L	9/9	SYR4	2012–2019
Dichloroacetic Acid	5.2 µg/L No EPA limit set worst single sample: 5.6 µg/L	9/10	SYR4	2013–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	7/7	LCR	2024
Selenium	4.31 µg/L 8.6% of the EPA limit 50 µg/L worst single sample: 4.4 µg/L	4/9	SYR4	2012–2019
Trichloroacetic Acid	3.31 µg/L No EPA limit set worst single sample: 3.5 µg/L	3/10	SYR4	2013–2019
Xylenes, Total	4.2 µg/L 0% of the EPA limit 10000 µg/L worst single sample: 4.6 µg/L	3/23	SYR4	2014–2019
Combined Uranium	2.165 µg/L 7.2% of the EPA limit 30 µg/L worst single sample: 2.2 µg/L	2/4	SYR4	2015
Atrazine	0.4400 µg/L 15% of the EPA limit 3 µg/L	1/16	SYR4	2012–2019
Combined Radium (-226 And -228)	0.8600 pCi/L 17% of the EPA limit 5 pCi/L	1/1	SYR4	2015
Ethylbenzene	0.6000 µg/L 0.1% of the EPA limit 700 µg/L	1/23	SYR4	2014–2019
Gross Alpha, Excl. Radon And U	3 pCi/L 20% of the EPA limit 15 pCi/L	1/4	SYR4	2015
Monochloroacetic Acid	2.1 µg/L No EPA limit set	1/10	SYR4	2013–2019

55 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, TotalArsenicAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinGross Beta Particle ActivityHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: DAY, KAY
Phone: 210-698-8449

Frequently asked questions about The Oaks Wsc

Is The Oaks Wsc tap water safe to drink?

EPA monitoring detected 24 contaminants in The Oaks Wsc'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 The Oaks Wsc's water?

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

How many people does The Oaks Wsc serve?

The Oaks Wsc reports serving 1,191 people in Texas, per its EPA record.

Has The Oaks Wsc had any water quality violations?

The EPA has 2 violations on file for The Oaks Wsc, of which 0 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.