Denning Wsc, TX
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2021-2023). 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.
Who runs the water here
Denning Wsc serves about 648 people through 255 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in San Augustine County, Texas. EPA system ID: TX2030004; phone on file: 936-288-0489. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
The highest 90th-percentile result EPA holds for Denning Wsc is 0 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
Against other Texas systems
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. Denning Wsc's reported as 0 (not detected) sits at the 23rd percentile in Texas and the 24th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
12 other systems share San Augustine County; 5 of them have a higher latest lead result than Denning Wsc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of San Augustine | 1,971 | 0 (not detected) |
| San Augustine Rural Wsc | 1,450 | 0 (not detected) |
| New Wsc | 1,128 | 1.23 ppb |
| City Of Broaddus | 406 | 0 (not detected) |
| Parkway Water System | 322 | 0.31 ppb |
| Powell Point Water System | 307 | 0 (not detected) |
| Anthony Harbor Subdivision | 108 | 0 (not detected) |
| Glen Oaks Water System | 87 | 1.15 ppb |
| Hickory Hollow Water System | 67 | 2.67 ppb |
| Lakewood Water System | 48 | 1.11 ppb |
Your move
Look up your address in Denning 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 Denning 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. Small systems behave differently: why small systems go over more often.