Hermann Pws, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 1.99 ppb (monitoring period 2024-2026). 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 Hermann Pws
Hermann Pws serves about 2,500 people through 1,330 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Gasconade County, Missouri. EPA system ID: MO6010360; phone on file: 573-694-2821. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is down 3.56 ppb from 5.55 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Hermann Pws is 10.3 ppb across 8 monitoring periods, none of them over 15 ppb (2 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1.99 ppb |
| 2025 | 5.55 ppb |
| 2023 | 5.55 ppb |
| 2022 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2019 | 10.3 ppb over 10 |
| 2017 | 10.3 ppb over 10 |
| 2016 | 3.42 ppb |
Against other Missouri systems
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. Hermann Pws's 1.99 ppb sits at the 70th percentile in Missouri and the 69th nationally (higher means more lead).
Other water systems in Gasconade County
9 other systems share Gasconade County; 6 of them have a higher latest lead result than Hermann Pws. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Owensville Pws | 2,800 | 4.63 ppb |
| Bland Pws | 539 | 2.34 ppb |
| Gasconade Pwsd #1 | 488 | 2.85 ppb |
| Confluence Rivers Gascony Village | 414 | 0 (not detected) |
| Rosebud Pws | 410 | 2.77 ppb |
| Gasconade Pws | 280 | 5.02 ppb |
| Morrison Pws | 140 | 1.5 ppb |
| Black Forest Hoa Inc No 2 | 50 | 8.4 ppb |
| Lake Northwoods Utility Inc | 25 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Hermann, 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 Hermann Pws 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Size matters more than most people expect: small vs large water systems.