Mt. Walnut Subdivision, GA
Exceeded the action level in the past
Latest 90th-percentile lead: 2.8 ppb (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Mt. Walnut Subdivision
Mt. Walnut Subdivision serves about 26 people through 10 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Hart County, Georgia. EPA system ID: GA1470084; phone on file: 706-376-8241. 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 7.7 ppb from 10.5 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Mt. Walnut Subdivision is 22.9 ppb across 7 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2.8 ppb |
| 2025 | 10.5 ppb over 10 |
| 2024 | 9 ppb |
| 2023 | 2.2 ppb |
| 2022 | 4.1 ppb |
| 2022 | 7.9 ppb |
| 2021 | 22.9 ppb over 15 |
Against other Georgia systems
Of the 1,681 Georgia systems with a lead result, the median latest reading is 0.68 ppb; 15 are over 15 ppb right now and 131 have gone over at some point. Mt. Walnut Subdivision's 2.8 ppb sits at the 82nd percentile in Georgia and the 79th nationally (higher means more lead).
Neighbouring systems
26 other systems share Hart County; 10 of them have a higher latest lead result than Mt. Walnut Subdivision. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Hartwell | 8,129 | 0 (not detected) |
| Hart Co. Water & Sewer Auth. | 5,637 | 0 (not detected) |
| Bowersville | 594 | 23 ppb |
| Sanders Mobile Home Park | 332 | 1.3 ppb |
| Reed Creek S/D | 242 | 5.9 ppb |
| Reed Creek Point/Reed Creek Heights | 216 | 2.9 ppb |
| Mcmullen Subdivision | 135 | 2.2 ppb |
| Paradise Pt-Rocky Point | 111 | 17 ppb |
| Vickery Point Subdivision | 111 | 2.2 ppb |
| Ridgeview Estates Sd | 111 | 0.6 ppb |
Next steps for Hartwell, GA
Test your own tap with a certified lab first-draw sample; Hartwell, GA 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 Mt. Walnut Subdivision 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. More in what a past exceedance means today.