Copper Hills Water System, TX
Lead detected, under the action levels
Latest 90th-percentile lead: 1.95 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.
Who runs the water here
Copper Hills Water System serves about 141 people through 47 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Hays County, Texas. EPA system ID: TX1050082; phone on file: 512-990-4400. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Copper Hills Water System's lead record
That is up 1.95 ppb from 0 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for Copper Hills Water System is 3.9 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.95 ppb |
| 2023 | 0 (not detected) |
| 2023 | 3.9 ppb |
| 2022 | 0.8 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. Copper Hills Water System's 1.95 ppb sits at the 81st percentile in Texas and the 69th nationally (higher means more lead).
Nearby utilities
49 other systems share Hays County; 11 of them have a higher latest lead result than Copper Hills Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of San Marcos | 72,970 | 1.63 ppb |
| City Of Kyle | 52,000 | 1.91 ppb |
| Texas State University - San Marcos | 43,552 | 1.3 ppb |
| Goforth Sud | 34,893 | 0 (not detected) |
| County Line Sud | 19,609 | 0 (not detected) |
| City Of Buda | 13,830 | 1.46 ppb |
| Dripping Springs Wsc | 8,037 | 1.89 ppb |
| Plum Creek | 7,065 | 1.24 ppb |
| Wimberley Wsc | 5,334 | 2.08 ppb |
| Hays County Wcid 2 | 3,381 | 2.88 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Austin, 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 Copper Hills Water System 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. Size matters more than most people expect: small vs large water systems.