PlainWater
Counties → Iowa

Winneshiek County, Iowa

Water Systems
43
Population Served
14,747
Total Violations
3,380
598 health-based
PFAS Detected
1
of 1 tested

Violation Analysis

95.3%
Systems with Violations
78.6
Avg Violations per System
17.7%
Health-Based Violations

Water Source Types

GW
43 systems (100%)

PFAS Contamination

1
Systems Tested
1
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

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

No violations on record (2) One or more violations (41)

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
Decorah Water Department 7,615 17 Detected
Calmar Water Supply 1,125 58 -
Ossian Water Supply 802 13 -
Freeport Water District 775 7 -
The Country Express 515 3 -
Turkey Valley Community School 490 66 -
Spillville Water Supply 385 6 -
Fort Atkinson Water Works 347 44 -
Ridgeway, City Of 275 98 -
South Winn Golf Club 218 68 -
Our Lady of Seven Dolors Parish 210 13 -
Castalia Water Works 145 56 -
Frankville RWD 135 0 -
Harvest Farm Campground LLC 129 12 -
Washington Prairie Lutheran Church 124 165 -
Pulpit Rock Camp Grounds 112 10 -
Decorah Sales Commission 105 91 -
Seed Savers Exchange 100 44 -
Silvercrest Golf & Country Club, Inc. 88 230 -
Scenic View Estates 78 100 -
Sherman Place Water & Road, Inc. 73 141 -
Jackson Heights Golf Course 72 37 -
Bluffton Resort 60 425 -
Highland General Store & Campground 59 234 -
Twin Springs Supper Club, L.L.C. 52 21 -
Burr Oak Lutheran Church 50 30 -
Kendallville Park 50 47 -
Bodensteiner Implement Company 50 37 -
Decorah Fish Hatchery 50 19 -
Laura Ingalls Wilder Museum Well 46 16 -
Windridge Implements L.L.C. 45 82 -
Pine Bluff 4H Camp 41 13 -
Barneys Bar and Grill 35 89 -
The Zipper 35 436 -
Under the Stars at Chimney Rock Cg LLC 33 111 -
Twin Springs Camp Area 32 19 -
Plantation Country View Subdivision 32 23 -
Henning Commercial Subdivision 31 0 -
Deerfield Heights Association 28 87 -
K-Town Tap 25 319 -
Pinters Garden Center & Pumpkin Patch 25 13 -
Big Springs Well 25 9 -
Lake Meyer Park 25 71 -

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 Winneshiek County? ▼
Winneshiek County has 3,380 total drinking water violations across 43 water systems, of which 598 are health-based violations. 95.3% of systems have at least one violation.
How many people get water from Winneshiek County systems? ▼
Water systems in Winneshiek County serve approximately 14,747 people through 43 public water systems.
Has PFAS been detected in Winneshiek County water? ▼
Of 1 water systems tested for PFAS in Winneshiek County, 1 had PFAS detected (100.0% detection rate).
What types of water sources supply Winneshiek County? ▼
Water systems in Winneshiek County use GW (43 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. 17.7% of Winneshiek 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.