Garnett Mhp (Sc0860058), SC
Lead detected, under the action levels
Latest 90th-percentile lead: 0.61 ppb (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. 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.
Who runs the water here
Garnett Mhp (Sc0860058) serves about 41 people through 18 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Berkeley County, South Carolina. EPA system ID: SC0860058; phone on file: 843-899-6108. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2022 (0.35 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Garnett Mhp (Sc0860058) is 1.4 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.61 ppb |
| 2022 | 0.35 ppb |
| 2019 | 1.4 ppb |
How Garnett Mhp (Sc0860058) compares
Of the 553 South Carolina systems with a lead result, the median latest reading is 0.73 ppb; 3 are over 15 ppb right now and 47 have gone over at some point. Garnett Mhp (Sc0860058)'s 0.61 ppb sits at the 48th percentile in South Carolina and the 45th nationally (higher means more lead).
Other water systems in Berkeley County
12 other systems share Berkeley County; 6 of them have a higher latest lead result than Garnett Mhp (Sc0860058). If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Bcwsa Sangaree W/D (0820002) | 95,345 | 0.52 ppb |
| Goose Creek City Of (Sc0810004) | 43,744 | 0 (not detected) |
| Bcwsa East Cooper (Sc0820009) | 12,933 | 0.7 ppb |
| Moncks Corner City Of | 8,956 | 0.64 ppb |
| Jamestown Town Of (Sc0810003) | 800 | 1.2 ppb |
| Macdougall Correctional Inst (Sc0870050) | 790 | 1.6 ppb |
| Bcwsa Sineath Mhp (0850018) | 594 | 0 (not detected) |
| Bcwsa Lake Moultrie Estates (0820004) | 156 | 0.5 ppb |
| Butlers Mhp (Sc0860063) | 77 | 3.2 ppb |
| Sandy Run Mhp (Sc0860037) | 41 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Moncks Corner, SC 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 Garnett Mhp (Sc0860058) 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. The action level is dropping - the 10 ppb rule from 2027.