Old Hwy 90 N Ridge W System, TX
Lead detected, under the action levels
Latest 90th-percentile lead: 0.6 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 Old Hwy 90 N Ridge W System
Old Hwy 90 N Ridge W System serves about 246 people through 82 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Medina County, Texas. EPA system ID: TX1630041; phone on file: 830-931-9272. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is down 2.1 ppb from 2.7 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Old Hwy 90 N Ridge W System is 7 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.6 ppb |
| 2022 | 2.7 ppb |
| 2021 | 7 ppb |
| 2018 | 0 (not detected) |
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. Old Hwy 90 N Ridge W System's 0.6 ppb sits at the 55th percentile in Texas and the 45th nationally (higher means more lead).
Nearby utilities
27 other systems share Medina County; 14 of them have a higher latest lead result than Old Hwy 90 N Ridge W System. 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
Test your own tap with a certified lab first-draw sample; Castroville, 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 Old Hwy 90 N Ridge W 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. The action level is dropping - the 10 ppb rule from 2027.