City Of Wylie, TX
Lead detected, under the action levels
Latest 90th-percentile lead: 1.03 ppb (monitoring period 2025-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
About City Of Wylie
City Of Wylie serves about 48,393 people through 16,131 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Collin County, Texas. EPA system ID: TX0430011; phone on file: 972-516-6010. They can tell you what your service line is made of and whether they pay to replace it.
City Of Wylie's lead record
That is down 1.37 ppb from 2.4 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for City Of Wylie is 3.64 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.03 ppb |
| 2024 | 2.4 ppb |
| 2023 | 2.09 ppb |
| 2020 | 1.7 ppb |
| 2017 | 2.4 ppb |
| 2016 | 3.64 ppb |
How City Of Wylie compares
Of the 4,447 Texas systems with a lead result, the median latest reading is 0.28 ppb; 15 are over 15 ppb right now and 202 have gone over at some point. City Of Wylie's 1.03 ppb sits at the 65th percentile in Texas and the 56th nationally (higher means more lead).
Other water systems in Collin County
34 other systems share Collin County; 21 of them have a higher latest lead result than City Of Wylie. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Plano | 292,059 | 1.68 ppb |
| City Of Frisco | 231,910 | 1.4 ppb |
| City Of Mckinney | 224,043 | 1.65 ppb |
| City Of Allen | 113,746 | 1.7 ppb |
| City Of Celina | 52,701 | 1.98 ppb |
| Town Of Prosper | 42,598 | 1.98 ppb |
| City Of Princeton | 37,019 | 1.76 ppb |
| City Of Melissa | 26,234 | 1.43 ppb |
| Culleoka Wsc | 24,615 | 0 (not detected) |
| City Of Anna | 23,960 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Wylie, TX may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask City Of Wylie whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.