Stonewall Wcid, TX
Lead detected, under the action levels
Latest 90th-percentile lead: 1.61 ppb (monitoring period 2023-2025). 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 Stonewall Wcid
Stonewall Wcid serves about 726 people through 243 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 Gillespie County, Texas. EPA system ID: TX0860104; phone on file: 830-456-7196. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is down 3.09 ppb from 4.7 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Stonewall Wcid is 4.7 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.61 ppb |
| 2022 | 4.7 ppb |
Where this result ranks
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. Stonewall Wcid's 1.61 ppb sits at the 77th percentile in Texas and the 65th nationally (higher means more lead).
Other water systems in Gillespie County
14 other systems share Gillespie County; 3 of them have a higher latest lead result than Stonewall Wcid. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Fredericksburg | 12,360 | 0.7 ppb |
| Lcra Harper Water System | 381 | 0.7 ppb |
| Deerwood Subdivision | 357 | 0 (not detected) |
| Harper Road Estates | 333 | 2 ppb |
| Northwest Hills Water Supply | 219 | 1.7 ppb |
| West Oak Heights | 213 | 0 (not detected) |
| Liveoaks Mobile Home Park | 200 | 0 (not detected) |
| Oakview Water System | 195 | 1.3 ppb |
| Whispering Oaks Water Works | 189 | 0 (not detected) |
| Reservation Ranch | 180 | - |
Next steps for Stonewall, TX
Test your own tap with a certified lab first-draw sample; Stonewall, 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 Stonewall Wcid 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.