Arkadelphia Waterworks, AR
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2023-2025). 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
Arkadelphia Waterworks serves about 11,855 people through 3,983 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 Clark County, Arkansas. EPA system ID: AR0000085; phone on file: 870-246-2321. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2022 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Arkadelphia Waterworks is 5 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1 ppb |
| 2022 | 2 ppb |
| 2019 | 4 ppb |
| 2016 | 5 ppb |
How Arkadelphia Waterworks 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. Arkadelphia Waterworks's 1 ppb sits at the 44th percentile in Arkansas and the 55th nationally (higher means more lead).
Other water systems in Clark County
8 other systems share Clark County; 1 of them has a higher latest lead result than Arkadelphia Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Gurdon Waterworks | 2,988 | 11.2 ppb |
| Clark County Country Water Facilities | 2,590 | - |
| River Valley Water Assn | 1,207 | - |
| Alpine Water Association | 750 | - |
| Caddo Valley Waterworks | 595 | - |
| Okolona Waterworks | 562 | - |
| Whelen Springs Water Dept | 559 | - |
| Amity Waterworks | 506 | - |
Your move
Test your own tap with a certified lab first-draw sample; Arkadelphia, 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 Arkadelphia 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. Size matters more than most people expect: small vs large water systems.