Mars Borough Water Works, PA
No lead results on file with EPA
Latest 90th-percentile lead: no result on file. The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. EPA's database has no Lead and Copper Rule results for this system. Without them there is nothing to go on, so a tap test is the only way to know.
Who runs the water here
Mars Borough Water Works serves about 1,956 people through 665 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 Butler County, Pennsylvania. EPA system ID: PA5100049; phone on file: 724-625-1858. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Neighbouring systems
30 other systems share Butler County. 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 Butler | 43,286 | 2 ppb |
| Cranberry Twp Wtp | 42,000 | 0.53 ppb |
| Slippery Rock Muni Auth | 15,778 | 0.55 ppb |
| Municipal Water Auth Adams Twp | 8,700 | 0.59 ppb |
| Harmony Boro Water Auth | 6,669 | 2.2 ppb |
| Zelienople Boro | 4,123 | 6.04 ppb |
| Petroleum Valley Rwa | 3,800 | 0 (not detected) |
| Seven Fields Boro Water Dept | 3,100 | - |
| Evans City Borough | 1,990 | - |
| Chicora Boro Water Supply | 1,100 | - |
What to do in your house
Test your own tap with a certified lab first-draw sample; Mars, 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 Mars Borough Water Works 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.