East Bristol Utility Coop, WI
Lead detected, under the action levels
Latest 90th-percentile lead: 2.95 ppb (monitoring period 2021-2021). 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.
About East Bristol Utility Coop
East Bristol Utility Coop serves about 80 people through 28 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Dane County, Wisconsin. EPA system ID: WI1130278. Ask the utility on your bill for your address in their service line inventory.
East Bristol Utility Coop's lead record
Against the period ending 2018 (3.8 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for East Bristol Utility Coop is 3.8 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2021 | 2.95 ppb |
| 2018 | 3.8 ppb |
Where this result ranks
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. East Bristol Utility Coop's 2.95 ppb sits at the 75th percentile in Wisconsin and the 81st nationally (higher means more lead).
Neighbouring systems
42 other systems share Dane County; 14 of them have a higher latest lead result than East Bristol Utility Coop. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Madison Water Utility | 272,000 | 1.8 ppb |
| Sun Prairie Utilities | 39,300 | 2.8 ppb |
| Fitchburg Utility Dist 1 | 29,900 | 2.3 ppb |
| Middleton Waterworks | 23,868 | 4 ppb |
| Waunakee Waterworks | 14,879 | 1.7 ppb |
| Verona Waterworks | 14,030 | 2.86 ppb |
| Stoughton Waterworks | 13,078 | 4.2 ppb |
| Oregon Waterworks | 11,200 | 4.97 ppb |
| Deforest Waterworks | 10,500 | 5.95 ppb |
| Mcfarland Waterworks | 9,676 | 2.1 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Sun Prairie, 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 East Bristol Utility Coop 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.