Is Blackwell Municipal Authority Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: Kay

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.

169

health-based violations

233

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2025-07-01 → 2025-07-31
TT	Health-based	Resolved	2025-07-01 → 2025-07-31
TT	Health-based	Resolved	2025-07-01 → 2025-07-31
TT	Health-based	Resolved	2025-07-01 → 2025-07-31
TT	Health-based	Resolved	2025-06-01 → 2025-06-30
TT	Health-based	Resolved	2025-06-01 → 2025-06-30
TT	Health-based	Resolved	2025-06-01 → 2025-06-30
TT	Health-based	Resolved	2025-06-01 → 2025-06-30
TT	Health-based	Resolved	2025-01-01 → 2025-01-31
TT	Health-based	Resolved	2025-01-01 → 2025-01-31

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Bromoform	49.64 µg/L No EPA limit set worst single sample: 60.5 µg/L	59/60	SYR4	2012–2019
Bromodichloromethane	40.255 µg/L No EPA limit set worst single sample: 53.4 µg/L	58/60	SYR4	2012–2019
Dibromoacetic Acid	13.2 µg/L No EPA limit set worst single sample: 14.6 µg/L	58/58	SYR4	2012–2019
Dibromochloromethane	58.865 µg/L No EPA limit set worst single sample: 73.1 µg/L	58/60	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	26.905 µg/L 45% of the EPA limit 60 µg/L worst single sample: 33.7 µg/L	58/58	SYR4	2012–2019
Chloroform	28.54 µg/L No EPA limit set worst single sample: 32.4 µg/L	57/60	SYR4	2012–2019
TTHM	158.2 µg/L 198% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 189 µg/L	57/58	SYR4	2012–2019
Dichloroacetic Acid	10.075 µg/L No EPA limit set worst single sample: 12 µg/L	56/58	SYR4	2012–2019
Monobromoacetic Acid	3.184 µg/L No EPA limit set worst single sample: 4.1 µg/L	43/58	SYR4	2012–2019
Trichloroacetic Acid	5.342 µg/L No EPA limit set worst single sample: 6.8 µg/L	43/58	SYR4	2012–2019
Copper	87 µg/L 6.7% of the EPA limit 1300 µg/L worst single sample: 106 µg/L	41/61	SYR4	2012–2018
Atrazine	0.5730 µg/L 19% of the EPA limit 3 µg/L worst single sample: 0.6000 µg/L	19/22	SYR4	2012–2019
Nitrate-Nitrite	840 µg/L 8.4% of the EPA limit 10000 µg/L	14/16	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	12/12	LCR	2024
Gross Beta Particle Activity	4.4505 pCi/L No EPA limit set worst single sample: 4.56 pCi/L	4/4	SYR4	2013–2019
Lithium	21 µg/L No EPA limit set	4/4	UCMR-5	2023
Lead	50.01 µg/L 333% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 54.5 µg/L	3/61	SYR4	2012–2018
Combined Radium (-226 And -228)	0.3956 pCi/L 7.9% of the EPA limit 5 pCi/L worst single sample: 0.4000 pCi/L	2/4	SYR4	2013–2019
Combined Uranium	1.5985 µg/L 5.3% of the EPA limit 30 µg/L worst single sample: 1.63 µg/L	2/4	SYR4	2013–2019
Gross Alpha, Excl. Radon And U	1.091 pCi/L 7.3% of the EPA limit 15 pCi/L worst single sample: 1.1 pCi/L	2/4	SYR4	2013–2019
Barium	24.8 µg/L 1.2% of the EPA limit 2000 µg/L	1/1	SYR4	2013
Monochloroacetic Acid	3.38 µg/L No EPA limit set	1/58	SYR4	2012–2019

75 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChromiumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: BLACKWELL MUNICIPAL AUTHORITY
Phone: 580-363-7250
Email: [email protected]

Frequently asked questions about Blackwell Municipal Authority

Is Blackwell Municipal Authority tap water safe to drink?

EPA monitoring detected 22 contaminants in Blackwell Municipal Authority'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 Blackwell Municipal Authority's water?

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

How many people does Blackwell Municipal Authority serve?

Blackwell Municipal Authority reports serving 7,668 people in Oklahoma, per its EPA record.

Has Blackwell Municipal Authority had any water quality violations?

The EPA has 233 violations on file for Blackwell Municipal Authority, of which 169 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.