Arena Waterworks, WI
Lead detected, under the action levels
Latest 90th-percentile lead: 1.1 ppb (monitoring period 2023-2023). 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.
Arena Waterworks at a glance
Arena Waterworks serves about 877 people through 324 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 Iowa County, Wisconsin. EPA system ID: WI1250073. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2020 (0.64 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Arena Waterworks is 1.1 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 1.1 ppb |
| 2020 | 0.64 ppb |
| 2017 | 0.85 ppb |
How Arena Waterworks compares
Of the 947 Wisconsin systems with a lead result, the median latest reading is 1.33 ppb; 6 are over 15 ppb right now and 71 have gone over at some point. Arena Waterworks's 1.1 ppb sits at the 44th percentile in Wisconsin and the 57th nationally (higher means more lead).
Other water systems in Iowa County
14 other systems share Iowa County; 7 of them have a higher latest lead result than Arena Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Dodgeville Waterworks | 4,583 | 1.4 ppb |
| Mineral Point Waterworks | 2,487 | 37 ppb |
| Barneveld Waterworks | 1,258 | 1.9 ppb |
| Highland Waterworks | 842 | 0 (not detected) |
| Ridgeway Waterworks | 690 | 3.48 ppb |
| Linden Waterworks | 547 | 2.2 ppb |
| Avoca Waterworks | 545 | 0 (not detected) |
| House On The Rock Resort | 470 | 1.78 ppb |
| Cobb Waterworks | 458 | 0 (not detected) |
| Rewey Waterworks | 290 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Arena, WI 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 Arena 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. The lead result guide covers how utilities pick the homes they sample. Size matters more than most people expect: small vs large water systems.