Water quality in Cottage Grove, Wisconsin
Cottage Grove is in Dane County. 298 active public water systems serve the county; 40 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Dane County
45 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Country View Estates Deerfield |
65 | 3 | 2.8 mi | |
| Cambridge Water & Sewer Utility Cambridge |
1,638 | 3 | 4.4 mi | |
| Marshall Waterworks Marshall |
3,862 | 0 | 7.6 mi | |
| Cottage Grove Waterworks Cottage Grove |
9,345 | 2 | 7.8 mi | |
| McFarland Waterworks Mc Farland |
9,676 | 0 | 12.3 mi | |
| Sun Prairie Utilities Sun Prairie |
39,300 | 0 | 12.5 mi | |
| Stoughton Waterworks Stoughton |
13,078 | 0 | 13.0 mi | |
| Bay View Heights INC Stoughton |
450 | 2 | 13.7 mi | |
| Woodbridge Estates Madison |
48 | 1 | 13.8 mi | |
| Monona Waterworks Monona |
8,624 | 0 | 14.0 mi | |
| East Bristol Utility Coop Sun Prairie |
80 | 0 | 14.7 mi | |
| Maple Bluff Waterworks Madison |
1,342 | 1 | 16.3 mi | |
| Madison Water Utility Madison |
272,000 | 2 | 16.8 mi | |
| Fitchburg Utility Dist 1 South Fitchburg |
350 | 0 | 17.2 mi | |
| Country View Mobile Home Community LLC Oregon |
80 | 4 | 17.2 mi | |
| Windsor Water Utility South Windsor |
4,607 | 0 | 17.6 mi | |
| Mendota Mental Health Inst Madison |
2,787 | 1 | 17.7 mi | |
| Lake Forest Water Coop Madison |
400 | 4 | 18.1 mi | |
| Oakhill Correctional Inst Oregon |
1,096 | 3 | 18.4 mi | |
| Lake Pointe Apts Well 2 5312-5318 Madison |
60 | 0 | 18.5 mi | |
| Lake Pointe/marina Bay Madison |
50 | 0 | 18.5 mi | |
| Lake Pointe Apts Well 1 5320-5326 Madison |
60 | 0 | 18.6 mi | |
| Deforest Waterworks Deforest |
10,500 | 2 | 18.7 mi | |
| Pine Ridge Apts Madison |
45 | 2 | 19.0 mi | |
| Country Vineyard 4 Oregon |
28 | 0 | 19.3 mi |
Non-community systems in Dane County (252: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Dane County, nearest to Cottage Grove first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Wisconsin records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.