Mifflin Cnty Muni Auth, PA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.23 ppb (monitoring period 2025-2025). 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
Mifflin Cnty Muni Auth serves about 29,432 people through 11,249 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Mifflin County, Pennsylvania. EPA system ID: PA4440010; phone on file: 717-248-0165. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is down 2.26 ppb from 3.49 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Mifflin Cnty Muni Auth is 3.49 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.23 ppb |
| 2022 | 3.49 ppb |
| 2019 | 1.8 ppb |
| 2016 | 0 (not detected) |
How Mifflin Cnty Muni Auth compares
Of the 516 Pennsylvania systems with a lead result, the median latest reading is 2 ppb; 143 are over 15 ppb right now and 156 have gone over at some point. Mifflin Cnty Muni Auth's 1.23 ppb sits at the 37th percentile in Pennsylvania and the 60th nationally (higher means more lead).
Other water systems in Mifflin County
5 other systems share Mifflin County; 0 of them have a higher latest lead result than Mifflin Cnty Muni Auth. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Allensville Muni Auth | 480 | - |
| Mcveytown Boro Auth | 478 | - |
| Newton Hamilton Boro | 270 | - |
| Wayne Twp Muni Water Auth | 167 | - |
| Mcma Hawstone | 60 | - |
Your move
Test your own tap with a certified lab first-draw sample; Milroy, PA 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 Mifflin Cnty Muni Auth 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. The action level is dropping - the 10 ppb rule from 2027.