Drinking water quality · 2024
· Verified
What's in Mckinney, TX tap water
22 contaminants were measured in the Mckinney, TX water system's 2024 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 22
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- PFBA
- Service area
- TX
PFAS — EPA UCMR5 (2023–2025)
1 PFAS compound detected in Mckinney, TX
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFBA
● Detected (no federal limit)below national p90 (18 ng/L across detecting U.S. systems)
Where your water comes from · EPA SDWIS
Mckinney, TX buys its drinking water from NORTH TEXAS MWD WYLIE WTP.
Source
Treatment
- PLANT - 3601 REDBUD BLVD
Distribution
Also buys water from NORTH TEXAS MWD WYLIE WTP.
Historical readings · EPA Six-Year Review (2012–2019)
13 historically-detected contaminants in Mckinney, TX
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
TTHM worst: 2014 | 0.0736 mg/L 92% | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
HAA5 worst: 2017 | 0.0408 mg/L within | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
COPPER worst: 2012 | 0.783 mg/L near national p90 | — | '12'13'16'17'18 |
LEAD worst: 2012 | 0.0268 mg/L | — | '12'13'16'17'18 |
DBAA worst: 2013 | 0.0024 mg/L | — | '13'14'15'16'17'18'19 |
DCAA worst: 2012 | 0.0203 mg/L | — | '12'13'14'15'16'17'18'19 |
MBAA worst: 2012 | 0.002 mg/L | — | '12'13'14'15'16'17'18'19 |
MCAA worst: 2012 | 0.0031 mg/L | — | '12'13'14'15'18'19 |
TCAA worst: 2012 | 0.0093 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMODICHLOROMETHANE worst: 2012 | 0.0133 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMOFORM worst: 2012 | 0.0018 mg/L | — | '12'13'14'15'16'17'18'19 |
CHLOROFORM worst: 2012 | 0.022 mg/L | — | '12'13'14'15'16'17'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.0081 mg/L | — | '12'13'14'15'16'17'18'19 |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Cyanide | 28.5–128 ug/LRangeTreatment plant | 200 ug/LMCLG | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.316–0.712 mg/LRangeTreatment plant | 4 mg/LMCLG | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.399 mg/LMaximumTreatment plant | 10 mg/LMCLG | Within the limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 2.24 mg/LAverageLevel Of Quarterly Data | 4 mg/LMRDL | Within the limit |
Disinfection byproducts
VOCs & pesticides
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.04–0.06 mg/LRangeTreatment plant | 2 mg/LMCLG | Within the limit |
| Chromium, TotalTotal chromium — the sum of all chromium forms, from natural deposits and industrial discharge. | 1.3 ug/LMaximumTreatment plant | 100 ug/LMCLG | Within the limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0Reported level2024 | None set | None detected |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 5Reported level2024 | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 5.3 pCi/LHighest single sampleTreatment plant | 0 pCi/LMCLG | Detected — no federal limit |
People also ask about Mckinney, TX's water
+Is Mckinney, TX tap water safe to drink in 2024?
The 2024 Consumer Confidence Report for the Mckinney, TX water utility lists 1 contaminant at or above the federal limit: PFBA. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in Mckinney, TX tap water?
22 contaminants were measured in Mckinney, TX's 2024 Consumer Confidence Report, spanning disinfection byproducts, metals, and inorganic chemicals. 14 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in Mckinney, TX tap water?
One contaminant in Mckinney, TX's 2024 report sits at or above the federal limit: PFBA (1.3× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in Mckinney, TX tap water?
The contaminant with the highest measured value relative to its federal limit in the 2024 report is PFBA, at 1.3× the federal threshold. It belongs to the pfas ("forever chemicals") family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Mckinney, TX's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Mckinney, TX's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.