Silo Ridge, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 2.02 ppb (monitoring period 2023-2025). 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.
Silo Ridge at a glance
Silo Ridge serves about 400 people through 30 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Polk County, Missouri. EPA system ID: MO5031210. Ask the utility on your bill for your address in their service line inventory.
Silo Ridge's lead record
Against the period ending 2022 (1.7 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Silo Ridge is 3.4 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.02 ppb |
| 2022 | 1.7 ppb |
| 2022 | 1.7 ppb |
| 2019 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 3.4 ppb |
| 2016 | 3.4 ppb |
How Silo Ridge 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. Silo Ridge's 2.02 ppb sits at the 71st percentile in Missouri and the 73rd nationally (higher means more lead).
Other water systems in Polk County
13 other systems share Polk County; 3 of them have a higher latest lead result than Silo Ridge. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Liberty Utilities Bolivar | 11,000 | 1.2 ppb |
| Humansville Pws | 1,048 | 6.94 ppb |
| Pleasant Hope Pws | 614 | 0 (not detected) |
| Bolivar Southtown Utilities Company Inc | 573 | 1.06 ppb |
| Fair Play Pws | 475 | 0 (not detected) |
| Texas Landing Utilities | 420 | 0 (not detected) |
| Morrisville Pws | 400 | 1.27 ppb |
| Halfway Pws | 151 | 2.93 ppb |
| Flemington Pws | 124 | 1.57 ppb |
| Lake Meadows Mhp | 100 | 5.68 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Bolivar, 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 Silo Ridge 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.