Mo American Hickory Hills, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2019-2027). 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 Mo American Hickory Hills
Mo American Hickory Hills serves about 125 people through 48 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Moniteau County, Missouri. EPA system ID: MO3036043; phone on file: 636-263-7370. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Mo American Hickory Hills's lead record
Against the period ending 2026 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Mo American Hickory Hills is 2 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2027 | 1 ppb |
| 2026 | 1 ppb |
| 2025 | 1 ppb |
| 2022 | 2 ppb |
| 2022 | 2 ppb |
| 2018 | 2 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. Mo American Hickory Hills's 1 ppb sits at the 48th percentile in Missouri and the 51st nationally (higher means more lead).
Other water systems in Moniteau County
5 other systems share Moniteau County; 4 of them have a higher latest lead result than Mo American Hickory Hills. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| California Pws | 4,423 | 2.18 ppb |
| Tipton Pws | 2,861 | 1.4 ppb |
| Moniteau County Pwsd 2 | 1,400 | 1.9 ppb |
| Jamestown Pws | 369 | 0 (not detected) |
| Clarksburg Pws | 353 | 1.37 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Cottleville, 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 Mo American Hickory Hills 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. Systems that went over once often dip back under; here is what that means.