Rolling Hills Water Supply, TX
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2019-2021). 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.
Rolling Hills Water Supply at a glance
Rolling Hills Water Supply serves about 186 people through 62 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Mclennan County, Texas. EPA system ID: TX1550139; phone on file: 903-822-3275. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2018 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Rolling Hills Water Supply is 0.77 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2021 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2017 | 0.77 ppb |
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. Rolling Hills Water Supply's reported as 0 (not detected) sits at the 10th percentile in Texas and the 15th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
53 other systems share Mclennan County; 15 of them have a higher latest lead result than Rolling Hills Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Waco | 146,241 | 1.89 ppb |
| City Of Hewitt | 16,978 | 0 (not detected) |
| City Of Robinson | 11,900 | 0 (not detected) |
| City Of Bellmead | 10,664 | 0 (not detected) |
| City Of Bruceville Eddy | 10,570 | 2.65 ppb |
| City Of Woodway | 9,383 | 0 (not detected) |
| City Of Lacy Lakeview | 7,275 | 0 (not detected) |
| City Of Mcgregor | 6,037 | 2.34 ppb |
| Elm Creek Wsc | 4,520 | 2.21 ppb |
| Cross Country Wsc | 3,939 | 0 (not detected) |
Next steps for Collinsville, TX
Look up your address in Rolling Hills Water Supply'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 Rolling Hills Water Supply 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. A zero today does not rule out a jump later - the rules are tightening in 2027.