Drinking water quality · 2024
What's in Frisco, TX tap water
28 contaminants were measured in the Frisco, TX water system's 2024 annual report. Each is shown below against its federal limit — 14 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 28
- Over federal limit
- 14
- Approaching the limit
- 0
- Worst contaminant
- Lead
- Service area
- TX
- LeadMetals · Reported level28 ug/L
- ChlorineDisinfectants · Reported level4 mg/L
- BromateDisinfection byproducts · Reported level10 ug/L
- ChloriteDisinfection byproducts · Reported level1 mg/L
- HAA5Disinfection byproducts · Reported level60 ug/L
- TTHMDisinfection byproducts · Reported level80 ug/L
- CyanideInorganic chemicals · Reported level200 ug/L
- FluorideInorganic chemicals · Reported level4 mg/L
- NitrateInorganic chemicals · Reported level10 mg/L
- BariumMetals · Reported level2 mg/L
- ChromiumOther · Reported level100 ug/L
- TurbidityPhysical & aggregate · Highest single sample1 NTU
- AtrazineVOCs & pesticides · Reported level3 ug/L
- SimazineVOCs & pesticides · Reported level4 ug/L
PFAS — EPA UCMR5 (2023–2025)
4 PFAS compounds detected in Frisco, 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.
PFPeA
● Detected (no federal limit)PFBS
● Detected (no federal limit)PFHxA
● Detected (no federal limit)PFBA
● Detected (no federal limit)Where your water comes from · EPA SDWIS
Frisco, TX buys its drinking water from NORTH TEXAS MWD WYLIE WTP.
Source
Treatment
Distribution
Also buys water from NORTH TEXAS MWD WYLIE WTP.
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 28 ug/LReported levelLocation Date Sampled | None set | At or above the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 2 mg/LReported levelMCL | None set | At or above the limit |
| CopperA metal that enters water from corroding household plumbing. | 28 ug/LReported levelLocation Date Sampled | None set | Within the limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 4 mg/LReported levelMrdlg | None set | At or above the limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 10 ug/LReported levelMCL | None set | At or above the limit |
| Chlorite | 1 mg/LReported levelMrdl | None set | At or above the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 60 ug/LReported levelMCL | None set | At or above the limit |
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 80 ug/LReported levelMCL | None set | At or above the limit |
| BromodichloromethaneA trihalomethane disinfection byproduct. | 14.9 ug/LReported levelHighest Level Detected | None set | Detected — no federal limit |
| BromoformA trihalomethane disinfection byproduct. | 2.4 ug/LReported levelHighest Level Detected | None set | Detected — no federal limit |
| ChloroformA trihalomethane formed when chlorine reacts with organic matter in water. | 16.1 ug/LReported levelHighest Level Detected | None set | Detected — no federal limit |
| DibromochloromethaneA trihalomethane disinfection byproduct. | 10.4 ug/LReported levelHighest Level Detected | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Cyanide | 200 ug/LReported levelMCL | None set | At or above the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 4 mg/LReported levelMCL | None set | At or above the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 10 mg/LReported levelMCL | None set | At or above the limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | 100 ug/LReported levelMCL | None set | At or above the limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 1 NTUHighest single sampleWylie | None set | At or above the limit |
VOCs & pesticides
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Cryptosporidium | Not detectedReported levelCryptosporidium & Giardia | None set | None detected |
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0Reported levelSystem-wide | None set | None detected |
| Giardia lamblia | Not detectedReported levelCryptosporidium & Giardia | None set | None detected |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 5 %Reported levelSystem-wide | 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. | 50 pCi/LReported levelMCL | None set | Detected — no federal limit |
People also ask about Frisco, TX's water
+Is Frisco, TX tap water safe to drink in 2024?
The 2024 Consumer Confidence Report for the Frisco, TX water utility lists 14 contaminants at or above the federal limit: Lead, Chlorine, Bromate, Chlorite, HAA5, TTHM, Cyanide, Fluoride, Nitrate, Barium, Chromium, Turbidity, Atrazine, and Simazine. 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 Frisco, TX tap water?
28 contaminants were measured in Frisco, TX's 2024 Consumer Confidence Report, spanning disinfection byproducts, microbial, and pfas ("forever chemicals"). 0 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 Frisco, TX tap water?
14 contaminants in Frisco, TX's 2024 report sit at or above the federal limit: Lead (1.9× the limit); Chlorine (1.0× the limit); Bromate (1.0× the limit); Chlorite (1.0× the limit); HAA5 (1.0× the limit); TTHM (1.0× the limit); Cyanide (1.0× the limit); Fluoride (1.0× the limit); Nitrate (1.0× the limit); Barium (1.0× the limit); Chromium (1.0× the limit); Turbidity (1.0× the limit); Atrazine (1.0× the limit); Simazine (1.0× 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 Frisco, TX tap water?
The contaminant with the highest measured value relative to its federal limit in the 2024 report is Lead, at 1.9× the federal threshold. It belongs to the metals family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Frisco, 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 Frisco, 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.