Adc - Cummins Unit Maint, AR
Exceeded the action level in the past
Latest 90th-percentile lead: 8 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. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Who runs the water here
Adc - Cummins Unit Maint serves about 4,362 people through 4 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by the state and draws groundwater, in Lincoln County, Arkansas. EPA system ID: AR0000315; phone on file: 870-850-8748. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is down 48 ppb from 56 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Adc - Cummins Unit Maint is 56 ppb across 6 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 8 ppb |
| 2025 | 56 ppb over 15 |
| 2024 | 2.6 ppb |
| 2022 | 1 ppb |
| 2019 | 3 ppb |
| 2016 | 3 ppb |
How Adc - Cummins Unit Maint compares
Of the 190 Arkansas systems with a lead result, the median latest reading is 1 ppb; 15 are over 15 ppb right now and 19 have gone over at some point. Adc - Cummins Unit Maint's 8 ppb sits at the 90th percentile in Arkansas and the 96th nationally (higher means more lead).
Nearby utilities
4 other systems share Lincoln County; 0 of them have a higher latest lead result than Adc - Cummins Unit Maint. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Yorktown Water Association | 7,364 | 2 ppb |
| Star City Waterworks | 2,173 | - |
| Gould Municipal Water-Sewer | 837 | - |
| Grady Waterworks | 313 | - |
What to do in your house
Test your own tap with a certified lab first-draw sample; Grady, 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 Adc - Cummins Unit Maint 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. More in what a past exceedance means today.