Center Ridge Water System, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 4.8 ppb (monitoring period 2020-2022). 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.
About Center Ridge Water System
Center Ridge Water System serves about 273 people through 99 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Calloway County, Missouri. EPA system ID: KY0180549; phone on file: 314-736-4672. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Center Ridge Water System's lead record
That is up 4.8 ppb from 0 ppb in the period ending 2019. The highest 90th-percentile result EPA holds for Center Ridge Water System is 4.8 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2022 | 4.8 ppb |
| 2019 | 0 (not detected) |
| 2016 | 0 (not detected) |
How Center Ridge Water System compares
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. Center Ridge Water System's 4.8 ppb sits at the 91st percentile in Missouri and the 90th nationally (higher means more lead).
Other water systems in Calloway County
3 other systems share Calloway County; 1 of them has a higher latest lead result than Center Ridge Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Center Ridge Water District #2 | 377 | 9.1 ppb |
| Center Ridge Water District #3 | 208 | 4.4 ppb |
| Center Ridge Water District #4 | 105 | 3.5 ppb |
Next steps for Des Peres, MO
Test your own tap with a certified lab first-draw sample; Des Peres, 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 Center Ridge Water System whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1400 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. Why sampled homes are the worst-case ones is in the guide to reading the number. The action level is dropping - the 10 ppb rule from 2027.