Old Hwy 90 Water Service, 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.
About Old Hwy 90 Water Service
Old Hwy 90 Water Service serves about 1,215 people through 405 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Medina County, Texas. EPA system ID: TX1630035; phone on file: 830-931-9272. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Old Hwy 90 Water Service's lead record
The highest 90th-percentile result EPA holds for Old Hwy 90 Water Service is 0 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
How Old Hwy 90 Water Service 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. Old Hwy 90 Water Service's reported as 0 (not detected) sits at the 29th percentile in Texas and the 28th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
27 other systems share Medina County; 18 of them have a higher latest lead result than Old Hwy 90 Water Service. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Benton City Wsc | 32,000 | 0.7 ppb |
| Yancey Wsc | 12,186 | 3.5 ppb |
| City Of Hondo | 11,044 | 1.4 ppb |
| East Medina County Sud Unit 1 | 6,153 | 0.8 ppb |
| City Of Devine | 4,335 | 0.8 ppb |
| City Of Castroville | 3,913 | 7.2 ppb |
| East Medina County Sud Unit 2 | 2,505 | 0.7 ppb |
| West Medina Wsc | 1,683 | 0.5 ppb |
| City Of La Coste | 1,488 | 4.6 ppb |
| East Medina County Sud Unit 3 | 1,365 | 0 (not detected) |
Next steps for Castroville, TX
Look up your address in Old Hwy 90 Water Service'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 Old Hwy 90 Water Service 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. Why sampled homes are the worst-case ones is in the guide to reading the number. A zero today does not rule out a jump later - the rules are tightening in 2027.