Iowa
Butler County drinking water quality
17 active public water systems serve 47,188 people in Butler County. 10 are compliant, 7 had at least one EPA violation in the past three years, 0 are designated serious violators, and 0 carry a health flag.
Community water systems
10 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
IA Regional Utilities Assoc (waverly) Waverly |
37,820 | 0 | 0 | |
|
Parkersburg Water Supply Parkersburg |
2,019 | 0 | 0 | |
|
Shell Rock Muni Water Supp Shell Rock |
1,269 | 0 | 0 | |
|
Clarksville Water Supply Clarksville |
1,254 | 0 | 0 | |
|
Aplington Water Supply Aplington |
1,126 | 0 | 0 | |
|
Greene Muni Water Supply Greene |
994 | 0 | 0 | |
|
Allison Water Supply Allison |
966 | 0 | 0 | |
|
Dumont Water Supply Dumont |
635 | 1 | 0 | |
|
New Hartford Water Supply New Hartford |
570 | 0 | 0 | |
|
Bristow Muni Water Supply Bristow |
145 | 1 | 0 |
Non-community systems (7: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Round Grove Golf & Country Club Greene |
87 | 0 | 0 | |
|
NE Iowa Christian Service Camp Bristow |
75 | 1 | 0 | |
|
Poet Biorefining-Shell Rock LLC Shell Rock |
70 | 0 | 0 | |
|
ST Johns Lutheran Church Greene |
52 | 1 | 0 | |
|
Card, Inc. Clarksville |
50 | 1 | 0 | |
|
Back Roads Bar & Grill Aredale |
31 | 1 | 0 | |
|
Beaver Meadows Country Club Parkersburg |
25 | 1 | 0 |
Inactive systems (26, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
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 Iowa 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. Retrieved from ECHO on Oct 11, 2026.