Hamilton, GA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.4 ppb (monitoring period 2025-2025). 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.
About Hamilton
Hamilton serves about 2,211 people through 628 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 Harris County, Georgia. EPA system ID: GA1450000; phone on file: 706-628-5321. 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 2024 (2.3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Hamilton is 3.5 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.4 ppb |
| 2024 | 2.3 ppb |
| 2023 | 3 ppb |
| 2022 | 2.6 ppb |
| 2018 | 3.5 ppb |
How Hamilton compares
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. Hamilton's 1.4 ppb sits at the 65th percentile in Georgia and the 62nd nationally (higher means more lead).
Neighbouring systems
8 other systems share Harris County; 4 of them have a higher latest lead result than Hamilton. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Harris County Water System | 22,922 | 4.7 ppb |
| Callaway Gardens Resorts, Inc. | 2,685 | 0 (not detected) |
| Pine Mountain | 2,135 | 6.4 ppb |
| Pine Mountain Valley | 1,209 | 1.5 ppb |
| Waverly Hall | 746 | 1.9 ppb |
| Shiloh | 504 | 0 (not detected) |
| Pine Mountain Club Chalets | 280 | 0 (not detected) |
| Harris County Water Works- Sky Meadows | 65 | 0 (not detected) |
Next steps for Hamilton, GA
Test your own tap with a certified lab first-draw sample; Hamilton, 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 Hamilton whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1600 ppb (copper action level 1,300 ppb).
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.