Culleoka Wsc, TX
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Culleoka Wsc at a glance
Culleoka Wsc serves about 24,615 people through 8,205 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: TX0430030; phone on file: 972-736-2592. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Culleoka Wsc's lead record
That is down 2.78 ppb from 2.78 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Culleoka Wsc is 2.78 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2024 | 2.78 ppb |
| 2023 | 1.46 ppb |
| 2022 | 2.3 ppb |
| 2020 | 1.7 ppb |
| 2017 | 1.62 ppb |
How Culleoka Wsc 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. Culleoka Wsc's reported as 0 (not detected) sits at the 48th percentile in Texas and the 39th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
34 other systems share Collin County; 24 of them have a higher latest lead result than Culleoka Wsc. 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 |
| City Of Wylie | 48,393 | 1.03 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 |
| City Of Anna | 23,960 | 0 (not detected) |
Next steps for Princeton, TX
Look up your address in Culleoka Wsc's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Culleoka Wsc 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. What a 90th-percentile result does and does not tell you: how to read a lead result. A zero today does not rule out a jump later - the rules are tightening in 2027.