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Tap water quality report

City of Red Oak

EPA monitoring tested this supplier for 109 contaminants and detected 28. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

109
contaminants tested
28
detected
18,577
people served
6
health-based violations
Texas rankingsLead in TexasPFAS in Texas
Water source
SWP
Ownership
Local government
Counties served
Ellis

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.

6
health-based violations
63
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1991-08-01 → 1991-08-31
MCL Health-based Archived 1991-08-01 → 1991-08-31
MCL Health-based Archived 1991-05-01 → 1991-05-31
MCL Health-based Archived 1991-05-01 → 1991-05-31
MCL Health-based Archived 1979-01-02 → 1980-01-01
MCL Health-based Archived 1979-01-02 → 1979-02-01
MR Monitoring Resolved 2013-03-01 → 2013-03-31
MR Monitoring Resolved 2013-03-01 → 2013-03-31
MR Monitoring Resolved 2013-03-01 → 2013-03-31
MR Monitoring Resolved 2013-03-01 → 2013-03-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfba 0.0102 µg/L 4/4 2024
PFBS 0.0049 µg/L 3/4 2024
Pfhxa 0.0058 µg/L 3/4 2024
Pfpea 0.0061 µg/L 3/4 2024

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Bromodichloromethane
14.4 µg/L
No EPA limit set
 54/57 SYR4 2013–2019
Chloroform
10 µg/L
No EPA limit set
 54/57 SYR4 2013–2019
Dibromochloromethane
21.2 µg/L
No EPA limit set
 54/57 SYR4 2013–2019
Bromoform
15.1 µg/L
No EPA limit set
 51/57 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
20.8 µg/L 35%
of the EPA limit 60 µg/L
 50/52 SYR4 2013–2019
Dichloroacetic Acid
10 µg/L
No EPA limit set
 49/52 SYR4 2013–2019
TTHM
55.1 µg/L 69%
of the EPA limit 80 µg/L
 49/52 SYR4 2013–2019
Copper
10954 µg/L 843%
of the EPA limit, in the worst sample — 1300 µg/L
 41/41 SYR4 2014–2017
Dibromoacetic Acid
7.6 µg/L
No EPA limit set
 39/52 SYR4 2013–2019
Trichloroacetic Acid
3.9 µg/L
No EPA limit set
 31/52 SYR4 2013–2019
Monobromoacetic Acid
5.4 µg/L
No EPA limit set
 28/52 SYR4 2013–2019
Nitrate
910 µg/L 9.1%
of the EPA limit 10000 µg/L
 22/22 SYR4 2012–2019
Monochloroacetic Acid
5.4 µg/L
No EPA limit set
 20/52 SYR4 2013–2019
Lead
364 µg/L 2427%
of the EPA limit, in the worst sample — 15 µg/L
 15/41 SYR4 2014–2017
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2023
Nitrate-Nitrite
887 µg/L 8.9%
of the EPA limit 10000 µg/L
 5/5 SYR4 2012–2015
Atrazine
0.2000 µg/L 6.7%
of the EPA limit 3 µg/L
 4/8 SYR4 2012–2019
Simazine
0.1000 µg/L 2.5%
of the EPA limit 4 µg/L
 4/8 SYR4 2012–2019
Barium
28 µg/L 1.4%
of the EPA limit 2000 µg/L
 2/2 SYR4 2016–2019
Cyanide
113 µg/L 56%
of the EPA limit 200 µg/L
 2/2 SYR4 2014–2017
Fluoride
1100 µg/L 28%
of the EPA limit 4000 µg/L
 2/2 SYR4 2014–2017
Chromium
2.3 µg/L 2.3%
of the EPA limit 100 µg/L
 1/2 SYR4 2016–2019
Combined Radium (-226 And -228)
1.5 pCi/L 30%
of the EPA limit 5 pCi/L
 1/1 SYR4 2016
Gross Beta Particle Activity
4.6 pCi/L
No EPA limit set
 1/1 SYR4 2016
81 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, TotalArsenicAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
STANFILL, MARK, L
Phone
972-617-6831

Frequently asked questions about City of Red Oak

Is City of Red Oak tap water safe to drink?

EPA monitoring detected 28 contaminants in City of Red Oak'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 Red Oak's water?

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

How many people does City of Red Oak serve?

City of Red Oak reports serving 18,577 people in Texas, per its EPA record.

Has City of Red Oak had any water quality violations?

The EPA has 63 violations on file for City of Red Oak, of which 6 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.