Mercy Wsc, TX
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Mercy Wsc serves about 2,458 people through 897 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 groundwater, in San Jacinto County, Texas. EPA system ID: TX2040058. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Mercy Wsc is 0 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
How Mercy 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. Mercy Wsc's reported as 0 (not detected) sits at the 36th percentile in Texas and the 32nd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in San Jacinto County
30 other systems share San Jacinto County; 20 of them have a higher latest lead result than Mercy Wsc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| San Jacinto Sud | 3,993 | 0 (not detected) |
| City Of Shepherd | 3,411 | 1.24 ppb |
| One Five O Wsc | 3,094 | 0 (not detected) |
| Dodge Oakhurst Wsc 2 | 2,500 | 0.57 ppb |
| Holiday Villages Of Livingston | 2,272 | 3.1 ppb |
| Pb & Sc Water Supply Corporation | 2,163 | 0 (not detected) |
| Cape Royale Utility District | 2,154 | 1.96 ppb |
| Waterwood Mud 1 | 1,446 | 4.8 ppb |
| Trails End Subdivision | 1,444 | 2.49 ppb |
| Lake Livingston Northwoods | 1,159 | 4.26 ppb |
Your move
Look up your address in Mercy Wsc's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Mercy 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. A zero today does not rule out a jump later - the rules are tightening in 2027.