Maple Ridge Mhp, MO
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2014-2022). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Maple Ridge Mhp at a glance
Maple Ridge Mhp serves about 140 people through 60 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Warren County, Missouri. EPA system ID: MO6048138; phone on file: 636-262-1805. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Maple Ridge Mhp is 1.7 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2022 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 1.7 ppb |
How Maple Ridge Mhp 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. Maple Ridge Mhp's reported as 0 (not detected) sits at the 11th percentile in Missouri and the 12th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
15 other systems share Warren County; 9 of them have a higher latest lead result than Maple Ridge Mhp. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Warrenton Pws | 8,208 | 0 (not detected) |
| St Charles Co Pwsd #2 Wright City | 3,550 | 1.14 ppb |
| Marthasville Pws | 1,200 | 0 (not detected) |
| St Charles County Pwsd 2 Warren | 1,192 | 1.22 ppb |
| Lake Sherwood Subd | 1,100 | 3.83 ppb |
| Truesdale Pws | 853 | 0 (not detected) |
| Innsbrook | 810 | 0 (not detected) |
| St Charles County Pwsd 2 North Oak Dr | 660 | 1.26 ppb |
| St Charles County Pwsd 2 Dutzow | 400 | 3.92 ppb |
| Pleasant Oak Mhp | 150 | 0.56 ppb |
What to do in your house
Look up your address in Maple Ridge Mhp's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Maple Ridge Mhp 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. Small systems behave differently: why small systems go over more often.