PlainWater
Counties → Iowa

Dubuque County, Iowa

Water Systems
75
Population Served
92,945
Total Violations
5,981
1,308 health-based
PFAS Detected
3
of 3 tested

Violation Analysis

96.0%
Systems with Violations
79.7
Avg Violations per System
21.9%
Health-Based Violations

Water Source Types

GW
50 systems (67%)

PFAS Contamination

3
Systems Tested
3
PFAS Detected
100.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Dubuque Iowa water systems by violation status, EPA SDWIS records.

No violations on record (2) One or more violations (48)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Dubuque Water Works 59,667 25 Detected
Asbury Municipal Water System 5,943 0 Clean
Dyersville Municipal Water Co 4,477 268 Clean
John Deere Dubuque Works 3,000 11 -
Cascade Municipal Water Supply 2,386 46 -
Peosta Water Supply 2,278 65 -
Epworth Water Supply 2,023 44 -
Farley Water Supply 1,766 73 -
Alpine Park 932 0 -
Hwy 20 Auto/Truck Plaza 912 20 -
Sun Down Ski Resort 685 29 -
Terrace Heights 548 32 -
Table Mound Park 455 62 -
Dubuque Sports Complex 400 194 -
New Vienna Water Supply 382 33 -
Worthington Water Supply 382 14 -
Swiss Valley Nature Center 363 55 -
Holy Cross Water Supply 356 66 -
Burds Green Acres Subdivision 312 45 -
Sageville Elementary School 310 66 -
Thunder Hills Home & Utility Assoc. 300 134 -
Fillmore Recreation Area 264 12 -
MUD Lake Park 257 8 -
Luxemburg Water Supply 245 8 -
Super 20 Mobile Home Court 236 81 -
Derby Grange Golf Inc 200 26 -
Saint Peter & Paul Parish - Sherril 200 100 -
Swiss Valley Park 183 21 -
Spring Valley Park 180 96 -
Town Clock 158 132 -
Breitbach Country Dining 150 67 -
Bankston Public Water System 145 110 -
Timberline Golf Course Inc. 130 300 -
Rolling Knolls Golf Course 118 306 -
Hickory Acres 115 53 -
Bernard Water System 114 9 -
Star Water 110 8 -
New Wine Park 105 85 -
Massey Marina 100 26 -
Tri-State Community Church 100 14 -
Heritage Trail 100 136 -
Lost Canyon MHP (Peosta) 97 70 -
Corporation of New Melleray 89 86 -
Dubuque Shooting Society 85 56 -
Rhodys 84 133 -
Riverview Ridge Campgrounds 80 16 -
Camp Granada 76 73 -
Offside Bar & Grill 75 2 -
Quality Water, Inc. #2 (K-L) 70 133 -
Lore Mound Mobile Home Park 68 56 -

Other Counties in Iowa

Polk County
38 systems · 552,627 served · 1,563 violations
Linn County
83 systems · 224,711 served · 8,540 violations
Scott County
77 systems · 178,285 served · 5,956 violations
Johnson County
125 systems · 167,742 served · 10,912 violations
Black Hawk County
19 systems · 161,225 served · 824 violations
Story County
21 systems · 121,108 served · 1,299 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Dubuque County? ▼
Dubuque County has 5,981 total drinking water violations across 75 water systems, of which 1,308 are health-based violations. 96.0% of systems have at least one violation.
How many people get water from Dubuque County systems? ▼
Water systems in Dubuque County serve approximately 92,945 people through 75 public water systems.
Has PFAS been detected in Dubuque County water? ▼
Of 3 water systems tested for PFAS in Dubuque County, 3 had PFAS detected (100.0% detection rate).
What types of water sources supply Dubuque County? ▼
Water systems in Dubuque County use GW (50 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 21.9% of Dubuque County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.