Cimmaron Bay Subdivision, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 5.23 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. 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.
Cimmaron Bay Subdivision at a glance
Cimmaron Bay Subdivision serves about 160 people through 93 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: MO3031290; phone on file: 314-464-3964. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Cimmaron Bay Subdivision's lead record
That is up 2.87 ppb from 2.36 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Cimmaron Bay Subdivision is 5.23 ppb across 10 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 5.23 ppb |
| 2024 | 2.36 ppb |
| 2024 | 2.41 ppb |
| 2022 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2019 | 0.99 ppb |
| 2018 | 0.99 ppb |
| 2018 | 0.99 ppb |
| 2016 | 0.59 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. Cimmaron Bay Subdivision's 5.23 ppb sits at the 92nd percentile in Missouri and the 92nd nationally (higher means more lead).
Nearby utilities
61 other systems share Camden County; 9 of them have a higher latest lead result than Cimmaron Bay Subdivision. 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) |
What to do in your house
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 Cimmaron Bay Subdivision 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.