Middlesex Twp Muni Auth, PA
Lead detected, under the action levels
Latest 90th-percentile lead: 2.5 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.
Middlesex Twp Muni Auth at a glance
Middlesex Twp Muni Auth serves about 3,527 people through 1,126 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Cumberland County, Pennsylvania. EPA system ID: PA7210063; phone on file: 717-243-0674. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is down 1.8 ppb from 4.3 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Middlesex Twp Muni Auth is 6.3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.5 ppb |
| 2022 | 4.3 ppb |
| 2019 | 6.3 ppb |
| 2016 | 0 (not detected) |
Against other Pennsylvania systems
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. Middlesex Twp Muni Auth's 2.5 ppb sits at the 55th percentile in Pennsylvania and the 78th nationally (higher means more lead).
Neighbouring systems
26 other systems share Cumberland County; 4 of them have a higher latest lead result than Middlesex Twp Muni Auth. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Pa American Water Co West | 105,127 | 0 (not detected) |
| Veolia Mechanicsburg | 45,013 | 3.3 ppb |
| Carlisle Water Trmt Plt | 26,000 | 2.6 ppb |
| Shippensburg Boro Water Auth | 17,800 | 1 ppb |
| South Middleton Twp Water Auth | 11,695 | 1.8 ppb |
| N Middleton Water Auth | 8,455 | 2 ppb |
| Mt Holly Springs Boro Auth | 3,261 | - |
| State Correctional Inst | 2,522 | 12 ppb |
| Newville Boro Water Auth | 2,070 | - |
| Us Army Garrison | 1,700 | 60.8 ppb |
Next steps for Carlisle, PA
Test your own tap with a certified lab first-draw sample; Carlisle, 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 Middlesex Twp 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. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.