Harris County Wcid 50 El Lago, TX
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 14.9 ppb (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
Harris County Wcid 50 El Lago at a glance
Harris County Wcid 50 El Lago serves about 3,924 people through 1,308 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Harris County, Texas. EPA system ID: TX1010241; phone on file: 281-326-5573. They can tell you what your service line is made of and whether they pay to replace it.
Harris County Wcid 50 El Lago's lead record
That is up 11.25 ppb from 3.65 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Harris County Wcid 50 El Lago is 14.9 ppb across 6 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 14.9 ppb over 10 |
| 2025 | 3.65 ppb |
| 2024 | 0 (not detected) |
| 2023 | 6.54 ppb |
| 2022 | 0 (not detected) |
| 2016 | 2.9 ppb |
How Harris County Wcid 50 El Lago 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. Harris County Wcid 50 El Lago's 14.9 ppb sits at the 100th percentile in Texas and the 99th nationally (higher means more lead).
Other water systems in Harris County
690 other systems share Harris County; 1 of them has a higher latest lead result than Harris County Wcid 50 El Lago. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Houston | 2,970,543 | 5 ppb |
| City Of Pasadena | 152,000 | 3.72 ppb |
| Clear Lake City Water Authority | 89,702 | 0.88 ppb |
| City Of Baytown | 86,004 | 2.1 ppb |
| City Of Houston Ud 5 - Kingwood | 80,073 | 0.51 ppb |
| Harris County Mud 165 | 40,503 | 1.3 ppb |
| City Of La Porte | 36,569 | 2.35 ppb |
| City Of Deer Park | 34,495 | 0 (not detected) |
| Northwest Harris County Mud 5 | 25,425 | 0 (not detected) |
| City Of Katy | 25,253 | 2.7 ppb |
Next steps for El Lago, TX
Test your own tap with a certified lab first-draw sample; El Lago, 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 Harris County Wcid 50 El Lago whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1700 ppb (copper action level 1,300 ppb).
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. This system is in the band the 2027 10 ppb rule changes.