Is City of Mckinney Tap Water Safe? Quality Report

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

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
MR	Monitoring	Resolved	2021-01-01
MR	Monitoring	Resolved	2021-01-01
MR	Monitoring	Resolved	2021-01-01
MR	Monitoring	Resolved	2021-01-01
MR	Monitoring	Resolved	2020-07-01 → 2020-12-31
MR	Monitoring	Resolved	2020-07-01 → 2020-12-31
MR	Monitoring	Resolved	2020-07-01 → 2020-12-31
MR	Monitoring	Resolved	2020-07-01 → 2020-12-31
MR	Monitoring	Resolved	2014-04-01 → 2014-06-30
MR	Monitoring	Resolved	2014-04-01 → 2014-06-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
Pfba	0.0087 µg/L	4/4	2025

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
Copper	756.05 µg/L 58% of the EPA limit 1300 µg/L worst single sample: 998 µg/L	250/250	SYR4	2012–2018
Bromodichloromethane	24.155 µg/L No EPA limit set worst single sample: 35.3 µg/L	210/210	SYR4	2012–2019
Chloroform	18.355 µg/L No EPA limit set worst single sample: 22 µg/L	210/210	SYR4	2012–2019
Dibromochloromethane	16.11 µg/L No EPA limit set worst single sample: 19.2 µg/L	210/210	SYR4	2012–2019
Dichloroacetic Acid	22.055 µg/L No EPA limit set worst single sample: 23.6 µg/L	210/210	SYR4	2012–2019
TTHM	60.995 µg/L 76% of the EPA limit 80 µg/L worst single sample: 73.6 µg/L	210/210	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	33.51 µg/L 56% of the EPA limit 60 µg/L worst single sample: 40.8 µg/L	210/210	SYR4	2012–2019
Trichloroacetic Acid	5.7 µg/L No EPA limit set worst single sample: 9.3 µg/L	206/210	SYR4	2012–2019
Bromoform	5.5545 µg/L No EPA limit set worst single sample: 16 µg/L	154/210	SYR4	2012–2019
Dibromoacetic Acid	11.995 µg/L No EPA limit set worst single sample: 20.6 µg/L	142/210	SYR4	2012–2019
Lead	4.175 µg/L 28% of the EPA limit 15 µg/L worst single sample: 61.9 µg/L	126/250	SYR4	2012–2018
Monobromoacetic Acid	4.95 µg/L No EPA limit set worst single sample: 7.1 µg/L	111/210	SYR4	2012–2019
Monochloroacetic Acid	4.55 µg/L No EPA limit set worst single sample: 5.8 µg/L	71/210	SYR4	2012–2019
Lead	0.00090 mg/L 6% of the EPA limit 0.0150 mg/L	19/19	LCR	2025

29 contaminants tested, none detected

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Utility contact

Contact: COX, BILL
Phone: 972-547-7507

Frequently asked questions about City of Mckinney

Is City of Mckinney tap water safe to drink?

EPA monitoring detected 15 contaminants in City of Mckinney'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 Mckinney's water?

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

How many people does City of Mckinney serve?

City of Mckinney reports serving 224,043 people in Texas, per its EPA record.

Has City of Mckinney had any water quality violations?

The EPA has 12 violations on file for City of Mckinney, 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.