Port Alto Wsc, TX
Lead detected, under the action levels
Latest 90th-percentile lead: 3.5 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.
Who runs the water here
Port Alto Wsc serves about 96 people through 32 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 Calhoun County, Texas. EPA system ID: TX0290028; phone on file: 713-582-7393. They can tell you what your service line is made of and whether they pay to replace it.
Port Alto Wsc's lead record
Against the period ending 2022 (4.4 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Port Alto Wsc is 4.4 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3.5 ppb |
| 2022 | 4.4 ppb |
How Port Alto Wsc 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. Port Alto Wsc's 3.5 ppb sits at the 93rd percentile in Texas and the 85th nationally (higher means more lead).
Neighbouring systems
11 other systems share Calhoun County; 3 of them have a higher latest lead result than Port Alto Wsc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Port Lavaca | 12,000 | 2.31 ppb |
| Gbra Calhoun County Rural Water System | 4,482 | 1.8 ppb |
| City Of Seadrift | 1,577 | 2.28 ppb |
| Port Oconnor Improvement District | 1,139 | 3.79 ppb |
| City Of Point Comfort | 759 | 3.01 ppb |
| Sunilandings Utilities | 342 | 4.26 ppb |
| Port Alto Hoa District 1 | 213 | 4.9 ppb |
| Shoalwater Flats Association | 171 | 0 (not detected) |
| El Campo Beach Property Owner Assn | 150 | 1.11 ppb |
| Seaport Lakes Subdivision | 36 | - |
Next steps for Port Lavaca, TX
Test your own tap with a certified lab first-draw sample; Port Lavaca, 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 Port Alto 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. The action level is dropping - the 10 ppb rule from 2027.