PlainWater
Counties → Minnesota

Olmsted County, Minnesota

Water Systems
83
Population Served
148,383
Total Violations
573
249 health-based
PFAS Detected
1
of 3 tested

Violation Analysis

50.6%
Systems with Violations
6.9
Avg Violations per System
43.5%
Health-Based Violations

Water Source Types

GW
50 systems (60%)

PFAS Contamination

3
Systems Tested
1
PFAS Detected
33.3%
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

Olmsted Minnesota water systems by violation status, EPA SDWIS records.

No violations on record (18) One or more violations (32)

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
Rochester 123,624 1 Detected
Stewartville 6,850 17 Clean
Byron 6,312 14 Clean
Eyota 2,043 9 -
Oronoco 2,040 4 -
Marion Wayside Rest Area MNDOT 1,336 20 -
Dover 792 13 -
Oronoco Estates MHC 505 10 -
Crosswinds Church 400 0 -
Chester Heights 300 7 -
Zumbro Ridge Estates 270 59 -
Rochester Tennis Connection 250 0 -
St. Bridget's Catholic Church 200 7 -
South Zumbro Lutheran Church 200 21 -
Hallmark Terrace Mobile Home Park 170 6 -
Sandy Slopes Community 158 4 -
Salem Road Covenant Church 140 0 -
Meadowbrook Addition 125 0 -
Domaille Engineering LLC 120 9 -
Hidden Meadows RV Park 104 0 -
Shar's Country Palace 100 6 -
Gamehaven Boy Scout Camp (WR-4) 100 0 -
Leashes and Leads 100 13 -
Briarwood Subdivision 90 30 -
Quarry Hill Nature Center 82 0 -
Mayowood Mansion 81 7 -
Chosen Valley Mobile Home Park 73 19 -
Willow Creek Campground 70 0 -
Clearwater Well Company 65 7 -
Country Home Trailer Park 56 40 -
American Fence Company 55 0 -
Sunrise Mobile Home Park 50 18 -
Douglas Saloon and Social Club 50 7 -
East St. Olaf Lutheran Church 50 27 -
Chesterwoods Park 50 7 -
All Craft Exteriors 50 27 -
Gar-Lin Dairy 45 0 -
Lrs 42 0 -
Kings Park - Hyland Addition 40 3 -
Rochester Welding Inc. 40 0 -
Rochester KOA Campground 40 7 -
Sargent's Landscape Nursery 40 0 -
Superior Plumbing & Heating 35 0 -
Sheet Metal Workers Local Union 10 30 0 -
Midwest Manufacturing 30 7 -
Our Lady of The Rosary Chapel 30 6 -
Maple Valley Golf Course 30 0 -
Stewartville Sportman's Club 30 13 -
Arnold's of Eyota 30 0 -
Watson Recycling 30 0 -

Other Counties in Minnesota

Hennepin County
202 systems · 1,273,140 served · 1,534 violations
Ramsey County
43 systems · 579,780 served · 369 violations
Dakota County
135 systems · 391,434 served · 1,282 violations
Anoka County
245 systems · 328,280 served · 2,022 violations
Washington County
195 systems · 259,368 served · 1,652 violations
St. Louis County
364 systems · 178,965 served · 3,967 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Olmsted County? ▼
Olmsted County has 573 total drinking water violations across 83 water systems, of which 249 are health-based violations. 50.6% of systems have at least one violation.
How many people get water from Olmsted County systems? ▼
Water systems in Olmsted County serve approximately 148,383 people through 83 public water systems.
Has PFAS been detected in Olmsted County water? ▼
Of 3 water systems tested for PFAS in Olmsted County, 1 had PFAS detected (33.3% detection rate).
What types of water sources supply Olmsted County? ▼
Water systems in Olmsted 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. 43.5% of Olmsted 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.