Ripon Water Utility, WI
Exceeded the action level in the past
Latest 90th-percentile lead: 3.5 ppb (monitoring period 2024-2024). 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
Ripon Water Utility serves about 7,716 people through 3,075 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Fond Du Lac County, Wisconsin. EPA system ID: WI4200476. Ask the utility on your bill for your address in their service line inventory.
Ripon Water Utility's lead record
Against the period ending 2024 (3.3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Ripon Water Utility is 28 ppb across 3 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 3.5 ppb |
| 2024 | 3.3 ppb |
| 2017 | 28 ppb over 15 |
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. Ripon Water Utility's 3.5 ppb sits at the 80th percentile in Wisconsin and the 85th nationally (higher means more lead).
Other water systems in Fond Du Lac County
14 other systems share Fond Du Lac County; 5 of them have a higher latest lead result than Ripon Water Utility. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Fond Du Lac Waterworks | 44,678 | 6.1 ppb |
| North Fond Du Lac Waterworks | 5,414 | 9.1 ppb |
| Campbellsport Waterworks | 1,825 | 1.12 ppb |
| Oakfield Waterworks | 1,058 | 0 (not detected) |
| Ashwood Grove Edgewater | 1,046 | 2.4 ppb |
| Fond Du Lac Tn Water Utility | 980 | 3.6 ppb |
| Brandon Waterworks | 872 | 6.86 ppb |
| Mount Calvary Waterworks | 478 | 0.45 ppb |
| St Cloud Waterworks | 471 | 1.9 ppb |
| Fairwater Waterworks | 365 | 1.75 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Ripon, 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 Ripon Water Utility 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. More in what a past exceedance means today.