Mammoth Spring Waterworks, AR
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
Mammoth Spring Waterworks serves about 1,777 people through 725 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 Fulton County, Arkansas. EPA system ID: AR0000206; phone on file: 870-625-3518. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Neighbouring systems
4 other systems share Fulton County. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Fulton County Water Authori | 2,411 | - |
| Salem Waterworks | 1,639 | - |
| Viola Waterworks | 336 | - |
| Hosanna Heights Water | 52 | - |
Your move
Test your own tap with a certified lab first-draw sample; Mammoth Spring, AR 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 Mammoth Spring Waterworks 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Systems that went over once often dip back under; here is what that means.