Chelsea Rose Subd, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 1.9 ppb (monitoring period 2024-2026). 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
Chelsea Rose Subd serves about 83 people through 33 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Camden County, Missouri. EPA system ID: MO3031244; phone on file: 314-464-3964. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Chelsea Rose Subd's lead record
That is down 6.2 ppb from 8.1 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for Chelsea Rose Subd is 8.1 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1.9 ppb |
| 2023 | 8.1 ppb |
| 2022 | 6.6 ppb |
| 2020 | 6.6 ppb |
| 2019 | 2.29 ppb |
| 2017 | 2.29 ppb |
| 2016 | 4.3 ppb |
Where this result ranks
Of the 1,674 Missouri systems with a lead result, the median latest reading is 1.04 ppb; 2 are over 15 ppb right now and 74 have gone over at some point. Chelsea Rose Subd's 1.9 ppb sits at the 69th percentile in Missouri and the 68th nationally (higher means more lead).
Nearby utilities
61 other systems share Camden County; 25 of them have a higher latest lead result than Chelsea Rose Subd. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Camden County Pwsd 4 Horseshoe Bend | 7,912 | 1.71 ppb |
| Camdenton Pws | 3,960 | 1.86 ppb |
| Osage Beach East Pws | 2,611 | 2.26 ppb |
| Camden County Pwsd #4 Shawnee Bend | 2,065 | 7.62 ppb |
| Osage Beach West Pws | 1,700 | 2.92 ppb |
| Camden County Pwsd 3 | 1,650 | 4.62 ppb |
| Camden County Pwsd 2 | 1,600 | 0 (not detected) |
| Camden County Pwsd 1 | 1,300 | 1.83 ppb |
| Encounter Cove Camp & Conference Center | 1,052 | 0 (not detected) |
| Sweet Pea Pws | 980 | 0 (not detected) |
Next steps for St Louis, MO
Test your own tap with a certified lab first-draw sample; St Louis, MO 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 Chelsea Rose Subd 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. Size matters more than most people expect: small vs large water systems.