County · Iowa
Dubuque County, Iowa: drinking water records
This overview covers 13 ZIP codes and 30 community water systems in Dubuque County. It also stands in for 2 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Dubuque Water Works IA3126052 | 59,667 | 60 | 2 | 0 | 5 ppb |
| Asbury Municipal Water System IA3102001 | 5,943 | 240 | 0 | 0 | 0 ppb |
| Dyersville Municipal Water Co IA3130091 | 4,477 | 120 | 0 | 0 | 1.7 ppb |
| Table Mound Park IA3100600 | 455 | 0 | 0 | 1 | 0 ppb |
| Cascade Municipal Water Supply IA3118080 | 2,386 | 0 | 0 | 0 | 0 ppb |
| Peosta Water Supply IA3170001 | 2,278 | 0 | 0 | 0 | 0.5 ppb |
| Epworth Water Supply IA3133033 | 2,023 | 0 | 0 | 0 | 3.9 ppb |
| Farley Water Supply IA3135018 | 1,766 | 0 | 0 | 0 | 1.3 ppb |
| Alpine Park IA3126605 | 932 | 0 | 0 | 0 | 4.6 ppb |
| New Vienna Water Supply IA3165014 | 382 | 0 | 0 | 0 | 0 ppb |
| Worthington Water Supply IA3189001 | 382 | 0 | 0 | 0 | 0 ppb |
| Holy Cross Water Supply IA3146055 | 356 | 0 | 0 | 0 | 0 ppb |
| Burds Green Acres Subdivision IA3170302 | 312 | 0 | 0 | 0 | 2 ppb |
| Thunder Hills Home & Utility Assoc. IA3170335 | 300 | 0 | 0 | 0 | 4.6 ppb |
| Luxemburg Water Supply IA3158001 | 245 | 0 | 0 | 0 | 0.8 ppb |
| Spring Valley Park IA3100606 | 180 | 0 | 0 | 0 | 0 ppb |
| Hickory Acres IA3126304 | 115 | 0 | 0 | 0 | 4.8 ppb |
| Bernard Water System IA3113001 | 114 | 0 | 0 | 0 | 1.0 ppb |
| Star Water IA3126316 | 110 | 0 | 0 | 0 | 0 ppb |
| Lost Canyon MHP (Peosta) IA3100608 | 97 | 0 | 0 | 0 | 12.4 ppb |
| Quality Water, INC. #2 (K-L) IA3126303 | 70 | 0 | 0 | 0 | 1 ppb |
| Lore Mound Mobile Home Park IA3100601 | 68 | 0 | 0 | 0 | 4 ppb |
| Lore Oaks Homeowners Assn. IA3126306 | 64 | 0 | 0 | 0 | 2.4 ppb |
| Gavin Estates IA3100823 | 52 | 0 | 0 | 0 | 0 ppb |
| North End Mobile Home Park IA3100609 | 40 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Dubuque County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 52039, 52073.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.