Lone Grove, OK
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. 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
Lone Grove serves about 4,863 people through 1,382 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Carter County, Oklahoma. EPA system ID: OK2001007; phone on file: 580-657-3113. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is down 7.53 ppb from 7.53 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Lone Grove is 7.53 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2020 | 7.53 ppb |
| 2017 | 0.96 ppb |
| 2016 | 6.16 ppb |
Against other Oklahoma systems
Of the 870 Oklahoma systems with a lead result, the median latest reading is 0.81 ppb; 6 are over 15 ppb right now and 66 have gone over at some point. Lone Grove's reported as 0 (not detected) sits at the 39th percentile in Oklahoma and the 35th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Carter County
7 other systems share Carter County; 5 of them have a higher latest lead result than Lone Grove. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Ardmore | 24,893 | 0 (not detected) |
| Southern Okla Water Corp | 11,250 | 2.94 ppb |
| Healdton | 2,785 | 1.4 ppb |
| Western Carter Co Water Corp | 2,000 | 2.49 ppb |
| Wilson Municipal Authority | 1,600 | 1.3 ppb |
| Golden Oaks Home Owners Assn | 135 | 0 (not detected) |
| Ratliff City | 131 | 1.86 ppb |
Next steps for Lone Grove, OK
Look up your address in Lone Grove'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 Lone Grove 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.