Lancaster Mud 1, TX
Lead detected, under the action levels
Latest 90th-percentile lead: 2.05 ppb (monitoring period 2021-2023). 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
Lancaster Mud 1 serves about 2,685 people through 895 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Dallas County, Texas. EPA system ID: TX0570176; phone on file: 713-805-9232. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lancaster Mud 1's lead record
That is up 2.05 ppb from 0 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Lancaster Mud 1 is 2.05 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 2.05 ppb |
| 2020 | 0 (not detected) |
| 2017 | 0 (not detected) |
Where this result ranks
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. Lancaster Mud 1's 2.05 ppb sits at the 83rd percentile in Texas and the 73rd nationally (higher means more lead).
Other water systems in Dallas County
32 other systems share Dallas County; 3 of them have a higher latest lead result than Lancaster Mud 1. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Dallas Water Utility | 1,356,479 | 1.09 ppb |
| City Of Irving | 264,546 | 1 ppb |
| City Of Garland | 248,822 | 1.22 ppb |
| City Of Grand Prairie | 201,843 | 1.2 ppb |
| City Of Mesquite | 158,412 | 1.05 ppb |
| City Of Carrollton | 136,170 | 0 (not detected) |
| City Of Richardson | 122,615 | 2.05 ppb |
| City Of Rowlett | 68,123 | 2.6 ppb |
| City Of Desoto | 57,999 | 0 (not detected) |
| City Of Cedar Hill | 50,904 | 0 (not detected) |
Next steps for Katy, TX
Test your own tap with a certified lab first-draw sample; Katy, 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 Lancaster Mud 1 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.