Iowa
Delaware County drinking water quality
28 active public water systems serve 9,400 people in Delaware County. 21 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
8 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Manchester Water Supply Manchester |
5,077 | 0 | 0 | |
|
Earlville Muni Water Supply Earlville |
724 | 0 | 0 | |
|
Hopkinton Municipal Utilities Hopkinton |
622 | 0 | 0 | |
|
Delhi Water Supply Delhi |
420 | 0 | 0 | |
|
Colesburg Water Supply Colesburg |
386 | 0 | 0 | |
|
Ryan Water Supply Ryan |
350 | 1 | 0 | |
|
Delaware Municipal Water Supply Delaware |
142 | 0 | 0 | |
|
Penn Center INC Delhi |
89 | 0 | 0 |
Non-community systems (20: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Backbone State Park Dundee |
508 | 0 | 0 | |
|
Hart Ridge Golf Course Manchester |
167 | 0 | 0 | |
|
Hartwick Point Well Delhi |
120 | 0 | 0 | |
|
Pin Oak Pub & Links Manchester |
100 | 4 | 1 | |
|
Backbone Golf and Country Club Strawberry Point |
64 | 0 | 0 | |
|
Twin Bridges Park Delaware C.c.b. Manchester |
61 | 0 | 0 | |
|
Eip Manufacturing, LLC Earlville |
60 | 0 | 0 | |
|
Clair-View Acres Waterworks LLC Delhi |
56 | 0 | 0 | |
|
Baileys Ford Park Delaware Ccb Manchester |
55 | 0 | 0 | |
|
Big River United Energy LLC Dyersville |
50 | 0 | 0 | |
|
Lost Beach Resort Delhi |
50 | 1 | 0 | |
|
Rocky Nook Association, Inc. Delhi |
50 | 0 | 0 | |
|
Manchester Fish Hatchery Manchester |
43 | 0 | 0 | |
|
Dollar General (earlville) Earlville |
40 | 2 | 1 | |
|
Delhi Lakeview Estates Delhi |
35 | 2 | 1 | |
|
Big House Petersburg |
27 | 0 | 0 | |
|
Tri-State Raceway Earlville |
27 | 3 | 1 | |
|
Turtle Creek Park Delaware C.c.b. Manchester |
27 | 0 | 0 | |
|
Lazy T Campground Manchester |
25 | 2 | 0 | |
|
R Place Masonville |
25 | 0 | 0 |
Inactive systems (52, 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.