Catarina Wsc, TX
Lead detected, under the action levels
Latest 90th-percentile lead: 2.3 ppb (monitoring period 2024-2026). 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
Catarina Wsc serves about 222 people through 74 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Dimmit County, Texas. EPA system ID: TX0640029; phone on file: 830-876-9904. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is up 1.3 ppb from 1 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Catarina Wsc is 6 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2.3 ppb |
| 2025 | 1 ppb |
| 2024 | 6 ppb |
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. Catarina Wsc's 2.3 ppb sits at the 86th percentile in Texas and the 76th nationally (higher means more lead).
Nearby utilities
6 other systems share Dimmit County; 4 of them have a higher latest lead result than Catarina Wsc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Carrizo Springs | 5,830 | 5.6 ppb |
| City Of Asherton | 1,225 | 4.1 ppb |
| Carrizo Hill Wsc | 1,050 | 0 (not detected) |
| City Of Big Wells | 870 | 2.7 ppb |
| Espantosa Water Supply | 210 | 9.3 ppb |
| Brundage Water System | 60 | 1.3 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Carrizo Springs, 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 Catarina 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Systems that went over once often dip back under; here is what that means.