North Alamo Wsc, TX
Lead detected, under the action levels
Latest 90th-percentile lead: 0.32 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.
About North Alamo Wsc
North Alamo Wsc serves about 171,195 people through 57,065 service connections, which makes it a very large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Hidalgo County, Texas. EPA system ID: TX1080029; phone on file: 956-383-1618. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2023 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for North Alamo Wsc is 3.01 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0.32 ppb |
| 2023 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 3.01 ppb |
How North Alamo 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. North Alamo Wsc's 0.32 ppb sits at the 51st percentile in Texas and the 42nd nationally (higher means more lead).
Nearby utilities
23 other systems share Hidalgo County; 13 of them have a higher latest lead result than North Alamo Wsc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mcallen Public Utility | 145,050 | 2.3 ppb |
| City Of Edinburg | 85,224 | 0 (not detected) |
| City Of Pharr | 79,715 | 1.09 ppb |
| City Of Mission | 77,058 | 1.83 ppb |
| Sharyland Wsc | 68,562 | 1 ppb |
| Agua Sud | 53,796 | 1 ppb |
| City Of Weslaco | 40,033 | 1.5 ppb |
| City Of San Juan | 30,000 | 0 (not detected) |
| City Of Alamo | 21,065 | 1 ppb |
| City Of Donna | 18,720 | 1.4 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Edinburg, 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 North Alamo 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. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.