Gasconade Pwsd #1, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 2.85 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.
Who runs the water here
Gasconade Pwsd #1 serves about 488 people through 180 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Gasconade County, Missouri. EPA system ID: MO6036015; phone on file: 573-437-7808. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2022 (2.81 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Gasconade Pwsd #1 is 4.05 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.85 ppb |
| 2022 | 2.81 ppb |
| 2022 | 2.81 ppb |
| 2019 | 3.3 ppb |
| 2019 | 3.3 ppb |
| 2019 | 4.05 ppb |
How Gasconade Pwsd #1 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. Gasconade Pwsd #1's 2.85 ppb sits at the 80th percentile in Missouri and the 80th nationally (higher means more lead).
Nearby utilities
9 other systems share Gasconade County; 3 of them have a higher latest lead result than Gasconade Pwsd #1. 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 |
| Hermann Pws | 2,500 | 1.99 ppb |
| Bland Pws | 539 | 2.34 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) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Owensville, 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 Gasconade Pwsd #1 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. The lead result guide covers how utilities pick the homes they sample. The action level is dropping - the 10 ppb rule from 2027.