Cedar Valley Mhp (Sc4660009), SC
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 12 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. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
About Cedar Valley Mhp (Sc4660009)
Cedar Valley Mhp (Sc4660009) serves about 290 people through 100 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in York County, South Carolina. EPA system ID: SC4660009; phone on file: 803-329-3778. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is up 12 ppb from 0 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Cedar Valley Mhp (Sc4660009) is 1680 ppb across 13 monitoring periods, 3 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 12 ppb over 10 |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2023 | 6 ppb |
| 2022 | 1680 ppb over 15 |
| 2022 | 3 ppb |
| 2021 | 12 ppb over 10 |
| 2020 | 6 ppb |
| 2019 | 11 ppb over 10 |
| 2018 | 8 ppb |
| 2018 | 25 ppb over 15 |
| 2017 | 13 ppb over 10 |
| 2017 | 28 ppb over 15 |
How Cedar Valley Mhp (Sc4660009) 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. Cedar Valley Mhp (Sc4660009)'s 12 ppb sits at the 98th percentile in South Carolina and the 98th nationally (higher means more lead).
Other water systems in York County
61 other systems share York County; 1 of them has a higher latest lead result than Cedar Valley Mhp (Sc4660009). If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Rock Hill City Of (Sc4610002) | 89,850 | 2 ppb |
| York County East Wd (Sc4620002) | 30,225 | 3 ppb |
| Fort Mill Town Of (Sc4610003) | 25,000 | 0 (not detected) |
| York County West Wd (Sc4620003) | 18,273 | 0 (not detected) |
| York City Of (Sc4610001) | 11,137 | 0 (not detected) |
| Tega Cay City Of (Sc4610008) | 10,500 | 0 (not detected) |
| Clover Town Of | 8,400 | 0 (not detected) |
| Riverview Rural Cws (Sc4620001) | 2,200 | 0 (not detected) |
| Hickory Grove Town Of (Sc4610004) | 654 | 2 ppb |
| Bgwc Foxwood (Sc4650008) | 575 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Catawba, 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 Cedar Valley Mhp (Sc4660009) whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1540 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. The lead result guide covers how utilities pick the homes they sample. See what changes at 10 ppb in 2027.