Harris-Waller Counties Mud 4, TX
No lead results on file with EPA
Latest 90th-percentile lead: no result on file. The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. EPA's database has no Lead and Copper Rule results for this system. Without them there is nothing to go on, so a tap test is the only way to know.
Who runs the water here
Harris-Waller Counties Mud 4 serves about 0 people through 4 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 Waller County, Texas. EPA system ID: TX2370137; phone on file: 713-860-6400. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Other water systems in Waller County
41 other systems share Waller County. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Prairie View A&M University | 9,550 | 0.74 ppb |
| City Of Prairie View | 8,184 | 1.3 ppb |
| City Of Hempstead | 7,158 | 6.94 ppb |
| City Of Waller | 5,448 | 1.5 ppb |
| Brookshire Mwd | 5,364 | 1.92 ppb |
| G & W Wsc | 4,887 | 0 (not detected) |
| Harris-Waller Counties Mud 5 | 4,098 | 0 (not detected) |
| Willow Creek Farms Mud | 3,453 | 0 (not detected) |
| Waller County Mud 37 | 3,258 | 0.7 ppb |
| Oak Hollow Subdivision | 1,980 | 0 (not detected) |
Next steps for Houston, TX
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 Harris-Waller Counties Mud 4 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Systems that went over once often dip back under; here is what that means.