Ralston Acres Water Supply Corporation, TX
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 10.3 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. 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.
About Ralston Acres Water Supply Corporation
Ralston Acres Water Supply Corporation serves about 385 people through 97 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 Harris County, Texas. EPA system ID: TX1010196. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
That is up 10.3 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Ralston Acres Water Supply Corporation is 10.3 ppb across 3 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 10.3 ppb over 10 |
| 2022 | 0 (not detected) |
| 2022 | 0 (not detected) |
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. Ralston Acres Water Supply Corporation's 10.3 ppb sits at the 99th percentile in Texas and the 97th nationally (higher means more lead).
Other water systems in Harris County
690 other systems share Harris County; 4 of them have a higher latest lead result than Ralston Acres Water Supply Corporation. 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 |
Your move
Test your own tap with a certified lab first-draw sample; Houston, 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 Ralston Acres Water Supply Corporation 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. See what changes at 10 ppb in 2027.