Oswego Rural Water Co (Sc4320006), SC
Lead detected, under the action levels
Latest 90th-percentile lead: 0.23 ppb (monitoring period 2022-2024). 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.
Oswego Rural Water Co (Sc4320006) at a glance
Oswego Rural Water Co (Sc4320006) serves about 3,282 people through 1,361 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Sumter County, South Carolina. EPA system ID: SC4320006; phone on file: 803-469-5495. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2021 (0.69 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Oswego Rural Water Co (Sc4320006) is 0.69 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0.23 ppb |
| 2021 | 0.69 ppb |
| 2018 | 0.2 ppb |
How Oswego Rural Water Co (Sc4320006) 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. Oswego Rural Water Co (Sc4320006)'s 0.23 ppb sits at the 39th percentile in South Carolina and the 41st nationally (higher means more lead).
Other water systems in Sumter County
17 other systems share Sumter County; 17 of them have a higher latest lead result than Oswego Rural Water Co (Sc4320006). If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Sumter City Of (Sc4310001) | 53,070 | 0.79 ppb |
| High Hills | 12,545 | 1.3 ppb |
| Shaw Afb (Sc4310501) | 9,000 | 0.54 ppb |
| Dalzell Water District (Sc4320001) | 3,912 | 2.1 ppb |
| Sumter Co-Wedgefield-Stateburg Wd | 1,200 | 0.57 ppb |
| Bgwc Oakland Plantation (Sc4350006) | 1,180 | 0.35 ppb |
| Mayesville Town Of (Sc4310003) | 665 | 0.3 ppb |
| Shiloh Water System (Sc4320005) | 645 | 5.7 ppb |
| Pinewood Town Of (Sc4310002) | 455 | 1.4 ppb |
| Sumter-Wessex S/D (Sc4350016) | 412 | 0.98 ppb |
Next steps for Sumter, SC
Test your own tap with a certified lab first-draw sample; Sumter, 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 Oswego Rural Water Co (Sc4320006) 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. The action level is dropping - the 10 ppb rule from 2027.