2025 city and supplier data
Results for City of Plano customers. Confirm the retail utility and system on your bill.
See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.
Wylie: 96–200; Leonard: 96–144mg/L as CaCO₃
Ranges from NTMWD treatment plants; not city distribution or home measurements
The supplier ranges reach hard or very hard levels, supporting a softener recommendation for scale control; measure your incoming water to size and set it correctly.
2.59ppm
Average of quarterly data; individual samples 0.38–4.00 ppm
Chloramine is the distribution disinfectant; use the correct filter configuration if reducing chloramine is a goal.
63.9ppb
Highest detected result as labelled in the city report; not a supplied LRAA
Below the report’s stated benchmark; this does not mean absent or describe an individual tap.
38.1ppb
Highest detected result as labelled in the city report; not a supplied LRAA
Below the report’s stated benchmark; this does not mean absent or describe an individual tap.
Wylie 0.492; Leonard 0.225ppm
Highest detected supplier results, not Plano tap samples
The report lists fluoride separately for two supplying plants; whole-home carbon filtration is not the same as dedicated fluoride treatment.
1.4ppb
90th-percentile tap sampling result; zero sites above the action level
This system-level sampling statistic is not a result for your home; plumbing can affect lead at an individual tap.
Not verified
No compound-specific result assessed in this summary
This does not establish whether PFAS are present or absent. Check compound-specific testing before choosing treatment.
0.704ppm
Highest city distribution result
Below the report’s stated benchmark; this does not mean absent or describe an individual tap.
2025 data; lead and copper sampled July 28, 2023
Results for City of Frisco customers. Confirm the retail utility and system on your bill.
See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.
Wylie: 96–200; Leonard: 96–144mg/L as CaCO₃
Ranges from NTMWD treatment plants; not city distribution or home measurements
The supplier ranges reach hard or very hard levels, supporting a softener recommendation for scale control; measure your incoming water to size and set it correctly.
2.16ppm
Reported quarterly-data value; individual samples0.3–3.86 ppm
The utility uses chloramine; reducing it requires a filter configured for that disinfectant.
36ppb
Report’s compliance value labelled Highest Level Detected; separate individual range shown
Below the report’s stated benchmark; this does not mean absent or describe an individual tap.
22ppb
Report’s compliance value labelled Highest Level Detected; separate individual range shown
Below the report’s stated benchmark; this does not mean absent or describe an individual tap.
Wylie 0.492; Leonard 0.225ppm
Highest detected NTMWD supplier results
These are supplier-plant measurements and are not a fluoride test at an individual Frisco tap.
2.31ppb
90th-percentile tap sampling result; zero sites above the action level
This system-level sampling statistic is not a result for your home; plumbing can affect lead at an individual tap.
Not verified
No compound-specific result assessed in this summary
This does not establish whether PFAS are present or absent. Check compound-specific testing before choosing treatment.
Wylie 0.866; Leonard 0.065ppm
Highest detected NTMWD supplier results
Both supplier values are below the report’s nitrate benchmark; do not present them as city distribution samples.
2025 city data with supplier values individually dated
Results for City of McKinney customers. Confirm the retail utility and system on your bill.
See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.
Wylie: 96–200; Leonard: 96–144mg/L as CaCO₃
Ranges from NTMWD treatment plants; not city distribution or home measurements
The supplier ranges reach hard or very hard levels, supporting a softener recommendation for scale control; measure your incoming water to size and set it correctly.
2.22ppm
City average of quarterly data; individual samples0.2–3.8 ppm
The 0.2 ppm sample occurred during annual chlorine maintenance, when ammonia addition temporarily stops; ordinary treatment uses chloramine.
35.4ppb
Highest locational running annual average
Below the report’s stated benchmark; this does not mean absent or describe an individual tap.
20.5ppb
Highest locational running annual average
Below the report’s stated benchmark; this does not mean absent or describe an individual tap.
Wylie 0.492; Leonard 0.225ppm
Highest detected NTMWD supplier results
These values are measured at supplying plants, not individual McKinney homes.
0.903ppb
90th-percentile tap sampling result; zero sites above the action level
This system-level sampling statistic is not a result for your home; plumbing can affect lead at an individual tap.
Not verified
No compound-specific result assessed in this summary
This does not establish whether PFAS are present or absent. Check compound-specific testing before choosing treatment.
0.397ppm
Highest city distribution result
Below the report’s stated benchmark; this does not mean absent or describe an individual tap.
Continue with your home details for general filtration guidance. We will not use another utility’s numbers as your result.
Find My Water System →A city report cannot establish a well’s water quality. Well-water treatment depends on your test results and site conditions.
Explore well-water systems →The figures below are provider-specific. They are not a countywide average.
| Utility | Hardness | Hardness source |
|---|---|---|
| Wylie: 96–200; Leonard: 96–144 mg/L as CaCO₃ · Moderately hard to very hard (Wylie); moderately hard to hard (Leonard) | 2025 | |
| Wylie: 96–200; Leonard: 96–144 mg/L as CaCO₃ · Moderately hard to very hard (Wylie); moderately hard to hard (Leonard) | 2025 | |
| Wylie: 96–200; Leonard: 96–144 mg/L as CaCO₃ · Moderately hard to very hard (Wylie); moderately hard to hard (Leonard) | 2025 |
Selected useful results—not a replacement for the utility’s complete report. Older measurements retain their original year.
Open the complete utility report ↗
| What was measured | Reported amount | Sample year / source date | How to read it |
|---|---|---|---|
| Water hardness | Wylie: 96–200; Leonard: 96–144 mg/L as CaCO₃Ranges from NTMWD treatment plants; not city distribution or home measurements | 2025View source ↗ | Moderately hard to very hard (Wylie); moderately hard to hard (Leonard)The supplier ranges reach hard or very hard levels, supporting a softener recommendation for scale control; measure your incoming water to size and set it correctly. |
| Chloramine | 2.59 ppmAverage of quarterly data; individual samples 0.38–4.00 ppm | 2025View source ↗ | Below 4 ppm MRDLChloramine is the distribution disinfectant; use the correct filter configuration if reducing chloramine is a goal. |
| Total trihalomethanes (TTHM) | 63.9 ppbHighest detected result as labelled in the city report; not a supplied LRAA | 2025View source ↗ | Below 80 ppb comparisonBelow the report’s stated benchmark; this does not mean absent or describe an individual tap. |
| Haloacetic acids (HAA5) | 38.1 ppbHighest detected result as labelled in the city report; not a supplied LRAA | 2025View source ↗ | Below 60 ppb comparisonBelow the report’s stated benchmark; this does not mean absent or describe an individual tap. |
| Fluoride | Wylie 0.492; Leonard 0.225 ppmHighest detected supplier results, not Plano tap samples | 2025View source ↗ | Below 4 ppm MCL comparisonThe report lists fluoride separately for two supplying plants; whole-home carbon filtration is not the same as dedicated fluoride treatment. |
| Nitrate as nitrogen | 0.704 ppmHighest city distribution result | 2025View source ↗ | Below 10 ppm comparisonBelow the report’s stated benchmark; this does not mean absent or describe an individual tap. |
| Lead | 1.4 ppb90th-percentile tap sampling result; zero sites above the action level | 2025View source ↗ | Below 15 ppb action levelThis system-level sampling statistic is not a result for your home; plumbing can affect lead at an individual tap. |
| Copper | 0.987 ppm90th-percentile tap sampling result; zero sites above the action level | 2025View source ↗ | Below 1.3 ppm action levelBelow the action level used in this report; this is not a measurement at every customer’s tap. |
| PFAS | Not verified No compound-specific result assessed in this summary | 2025 report reviewView source ↗ | Cannot assess high or lowThis does not establish whether PFAS are present or absent. Check compound-specific testing before choosing treatment. |
ppm ≈ mg/L; ppb ≈ µg/L; ppt ≈ ng/L in drinking water. Hardness in gpg = mg/L as CaCO₃ ÷ 17.1. ND means not detected at the method’s reporting limit—not zero.
MCL is a maximum contaminant level. MRDL is a disinfectant limit. Lead/copper action levels use system sampling percentiles and are not a safe-tap threshold. TTHM/HAA5 compliance uses locational annual averages.
PFOA/PFOS comparisons use EPA’s 4 ppt values. Historical detections are not a present compliance finding; EPA assesses compliance using running annual averages. Rule implementation is being reviewed. EPA PFAS benchmarks and implementation ↗
Choose the system size, keep useful existing equipment, and review your filtration goals.
Source water. Plano distributes purchased surface water treated by NTMWD. Its report provides separate Wylie and Leonard treatment-plant tables, so supplier readings should not be presented as measurements throughout Plano.
Selected useful results—not a replacement for the utility’s complete report. Older measurements retain their original year.
Open the complete utility report ↗
| What was measured | Reported amount | Sample year / source date | How to read it |
|---|---|---|---|
| Water hardness | Wylie: 96–200; Leonard: 96–144 mg/L as CaCO₃Ranges from NTMWD treatment plants; not city distribution or home measurements | 2025View source ↗ | Moderately hard to very hard (Wylie); moderately hard to hard (Leonard)The supplier ranges reach hard or very hard levels, supporting a softener recommendation for scale control; measure your incoming water to size and set it correctly. |
| Chloramine | 2.16 ppmReported quarterly-data value; individual samples0.3–3.86 ppm | 2025View source ↗ | Below 4 ppm MRDL comparisonThe utility uses chloramine; reducing it requires a filter configured for that disinfectant. |
| Total trihalomethanes (TTHM) | 36 ppbReport’s compliance value labelled Highest Level Detected; separate individual range shown | 2025View source ↗ | Below 80 ppb comparisonBelow the report’s stated benchmark; this does not mean absent or describe an individual tap. |
| Haloacetic acids (HAA5) | 22 ppbReport’s compliance value labelled Highest Level Detected; separate individual range shown | 2025View source ↗ | Below 60 ppb comparisonBelow the report’s stated benchmark; this does not mean absent or describe an individual tap. |
| Fluoride | Wylie 0.492; Leonard 0.225 ppmHighest detected NTMWD supplier results | 2025View source ↗ | Below 4 ppm MCL comparisonThese are supplier-plant measurements and are not a fluoride test at an individual Frisco tap. |
| Nitrate as nitrogen | Wylie 0.866; Leonard 0.065 ppmHighest detected NTMWD supplier results | 2025View source ↗ | Below 10 ppm MCL comparisonBoth supplier values are below the report’s nitrate benchmark; do not present them as city distribution samples. |
| Lead | 2.31 ppb90th-percentile tap sampling result; zero sites above the action level | July 28, 2023View source ↗ | Below 15 ppb action levelThis system-level sampling statistic is not a result for your home; plumbing can affect lead at an individual tap. |
| Copper | 0.455 ppm90th-percentile tap sampling result; zero sites above the action level | July 28, 2023View source ↗ | Below 1.3 ppm action levelBelow the action level used in this report; this is not a measurement at every customer’s tap. |
| PFAS | Not verified No compound-specific result assessed in this summary | 2025 report reviewView source ↗ | Cannot assess high or lowThis does not establish whether PFAS are present or absent. Check compound-specific testing before choosing treatment. |
ppm ≈ mg/L; ppb ≈ µg/L; ppt ≈ ng/L in drinking water. Hardness in gpg = mg/L as CaCO₃ ÷ 17.1. ND means not detected at the method’s reporting limit—not zero.
MCL is a maximum contaminant level. MRDL is a disinfectant limit. Lead/copper action levels use system sampling percentiles and are not a safe-tap threshold. TTHM/HAA5 compliance uses locational annual averages.
PFOA/PFOS comparisons use EPA’s 4 ppt values. Historical detections are not a present compliance finding; EPA assesses compliance using running annual averages. Rule implementation is being reviewed. EPA PFAS benchmarks and implementation ↗
Choose the system size, keep useful existing equipment, and review your filtration goals.
Source water. Frisco receives treated NTMWD surface water. Its2025 report includes Wylie and Leonard supplier tables separately from Frisco distribution sampling.
Selected useful results—not a replacement for the utility’s complete report. Older measurements retain their original year.
Open the complete utility report ↗
| What was measured | Reported amount | Sample year / source date | How to read it |
|---|---|---|---|
| Water hardness | Wylie: 96–200; Leonard: 96–144 mg/L as CaCO₃Ranges from NTMWD treatment plants; not city distribution or home measurements | 2025View source ↗ | Moderately hard to very hard (Wylie); moderately hard to hard (Leonard)The supplier ranges reach hard or very hard levels, supporting a softener recommendation for scale control; measure your incoming water to size and set it correctly. |
| Chloramine | 2.22 ppmCity average of quarterly data; individual samples0.2–3.8 ppm | 2025View source ↗ | Below 4 ppm MRDLThe 0.2 ppm sample occurred during annual chlorine maintenance, when ammonia addition temporarily stops; ordinary treatment uses chloramine. |
| Total trihalomethanes (TTHM) | 35.4 ppbHighest locational running annual average | 2025View source ↗ | Below 80 ppb comparisonBelow the report’s stated benchmark; this does not mean absent or describe an individual tap. |
| Haloacetic acids (HAA5) | 20.5 ppbHighest locational running annual average | 2025View source ↗ | Below 60 ppb comparisonBelow the report’s stated benchmark; this does not mean absent or describe an individual tap. |
| Fluoride | Wylie 0.492; Leonard 0.225 ppmHighest detected NTMWD supplier results | 2025View source ↗ | Below 4 ppm MCL comparisonThese values are measured at supplying plants, not individual McKinney homes. |
| Nitrate as nitrogen | 0.397 ppmHighest city distribution result | 2025View source ↗ | Below 10 ppm comparisonBelow the report’s stated benchmark; this does not mean absent or describe an individual tap. |
| Lead | 0.903 ppb90th-percentile tap sampling result; zero sites above the action level | 2025View source ↗ | Below 15 ppb action levelThis system-level sampling statistic is not a result for your home; plumbing can affect lead at an individual tap. |
| Copper | 0.787 ppm90th-percentile tap sampling result; zero sites above the action level | 2025View source ↗ | Below 1.3 ppm action levelBelow the action level used in this report; this is not a measurement at every customer’s tap. |
| PFAS | Not verified No compound-specific result assessed in this summary | 2025 report reviewView source ↗ | Cannot assess high or lowThis does not establish whether PFAS are present or absent. Check compound-specific testing before choosing treatment. |
ppm ≈ mg/L; ppb ≈ µg/L; ppt ≈ ng/L in drinking water. Hardness in gpg = mg/L as CaCO₃ ÷ 17.1. ND means not detected at the method’s reporting limit—not zero.
MCL is a maximum contaminant level. MRDL is a disinfectant limit. Lead/copper action levels use system sampling percentiles and are not a safe-tap threshold. TTHM/HAA5 compliance uses locational annual averages.
PFOA/PFOS comparisons use EPA’s 4 ppt values. Historical detections are not a present compliance finding; EPA assesses compliance using running annual averages. Rule implementation is being reviewed. EPA PFAS benchmarks and implementation ↗
Choose the system size, keep useful existing equipment, and review your filtration goals.
Source water. McKinney receives treated surface water from NTMWD. Its report includes Wylie and Leonard supplier results alongside tests collected within McKinney’s distribution system.
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More about your local water
Shared suppliers. Separate city water reports.
A shared wholesale supplier does not make every city result identical. Treatment-plant hardness and fluoride values are labelled as supplier data; disinfectant and byproduct results retain the reporting city's sampling basis. An address in Collin County alone does not identify your water system.
A useful local question
Cities can share NTMWD source water while testing their own distribution systems at different sites and times. Compare the same substance, units and measurement basis, then use a home hardness test to set a softener.
We keep each utility’s results separate, show the reported sample year, and distinguish averages, maxima and tap-sampling percentiles. Hardness classifications use USGS ranges. Missing data stays unknown.
Sources checked October 23, 2026
Your water → your home → your system
Choose the system size, keep useful existing equipment, and review your filtration goals.