Callawassie Island (Sc0750041), SC
Lead detected, under the action levels
Latest 90th-percentile lead: 2.6 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.
Who runs the water here
Callawassie Island (Sc0750041) serves about 900 people through 825 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws surface water, in Beaufort County, South Carolina. EPA system ID: SC0750041; phone on file: 843-768-0641. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is up 2.09 ppb from 0.51 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Callawassie Island (Sc0750041) is 2.6 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 2.6 ppb |
| 2021 | 0.51 ppb |
| 2018 | 1.3 ppb |
Against other South Carolina systems
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. Callawassie Island (Sc0750041)'s 2.6 ppb sits at the 74th percentile in South Carolina and the 78th nationally (higher means more lead).
Other water systems in Beaufort County
12 other systems share Beaufort County; 2 of them have a higher latest lead result than Callawassie Island (Sc0750041). If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Bjw&Sa (Sc0720003) | 164,829 | 0.62 ppb |
| Hilton Head Psd 1 (0720006) | 25,558 | 1 ppb |
| South Island Psd (Sc0720001) | 18,299 | 2.1 ppb |
| Fripp Island Psd (Sc0720002) | 3,536 | 2.3 ppb |
| Broad Creek Psd (Sc0720009) | 3,481 | 0.51 ppb |
| Water Oak Utility Co (Sc0750002) | 2,318 | 2.4 ppb |
| Harbor Island (Sc0750013) | 1,039 | 4.3 ppb |
| Taylor Mh Estate (Sc0760015) | 162 | 1.2 ppb |
| Lakeview Mhp (Sc0760001) | 114 | 0 (not detected) |
| Beaufort Mhp (Sc0760016) | 107 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Kiawah Island, 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 Callawassie Island (Sc0750041) 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.