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County water report

Roseau County Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Roseau County, Minnesota.

Water grade

F

Water score

7.4

State rank

#86

of 87

Health violations

34

EPA SDWIS, 5-year lookback

Watershed impaired

Not reported

EPA ATTAINS coverage varies by state

Monitoring sites

18

1,600 recent measurements

Live streamflow

134%

ROSEAU RIVER AT ROSS, MN

Water at a glance

Key Water Indicators for Roseau County

EPA SDWIS

Safety Grade

F

Score: 7.4 / 100

EPA SDWIS

Active Violations

34

5-year health-based lookback

EPA ATTAINS

Watershed Health

Not reported

Coverage varies by state

USGS NWIS

Streamflow Snapshot

134% of mean

ROSEAU RIVER AT ROSS, MN

EPA WQP

Monitoring Sites

18

1,600 recent readings

Source: EPA SDWIS · Safe Drinking Water Information System

Drinking Water Compliance

Compliance grade

F

Based on EPA SDWIS compliance history.

Water score

Higher scores indicate cleaner recent compliance records.

7.4/100

Health violations

34

Health-based violations

Violations per 100K served

478.8

Population-normalized SDWIS rate

Editorial analysis

Understanding Roseau County’s Water

Drinking Water Quality Overview

EPA SDWIS

Roseau County's water systems carry a failing grade, scoring 7.4 out of 100. Over the past five years, EPA SDWIS records 34 health-based violations — a pattern that public water utilities are required to disclose and correct.

River & Streamflow Status

USGS NWIS

USGS NWIS gauge data (as of 2026-05-14T14:00:00.000-05:00) puts ROSEAU RIVER at 418.0 cfs — flowing above its historical average at 134% of mean. Streamflow is a leading indicator of drought stress, sediment load, and dilution capacity: low flows concentrate pollutants and warm water temperatures, stressing aquatic life and, in surface-water-dependent systems, the source water quality for treatment plants.

Monitoring Network

EPA WQP

EPA's Water Quality Portal (WQP) aggregates monitoring data from federal, state, and tribal agencies. Roseau County has moderate coverage with 18 active monitoring sites with 1,600 recent measurements on record. Predominant monitoring categories include physical and nutrient. More monitoring sites generally indicate greater scientific attention to local water conditions — and provide the baseline data that regulators use to set future impairment listings.

Editorial advisory

What the data suggests for Roseau County

Water Verdict

Roseau County, Minnesota receives a poor water quality assessment with a grade of F and a score of 7.4 out of 100. The water supply has documented quality issues. Residents are strongly encouraged to use filtered or bottled water for drinking and to stay informed about utility improvement plans. The county's primary USGS gauge drains roughly 1,090 square miles of upstream watershed, giving local source waters a regional footprint. At the most recent USGS reading, local streamflow was running above its historical mean at 133.5%.

Violation Context

EPA SDWIS records for Roseau County, Minnesota show 34 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 478.8 violations per 100,000 people served, this rate is high and signals significant water quality management issues. For independent context, 1,600 water-quality monitoring results have been recorded across the county in the EPA Water Quality Portal over the past five years.

Consumer Guidance

Roseau County has a Grade F compliance record with 34 health-based violations — among the highest levels in the country. Roseau County's drinking-water compliance score is 7.4 out of 100. Residents are strongly advised to use a certified NSF 58 reverse-osmosis filter or bottled water for all drinking and cooking until violations are corrected. Contacting the Minnesota Department of Environmental Quality or Health can expedite utility compliance action. With 18 active water-quality monitoring sites in Roseau County, data coverage is strong. A pipeline streamflow snapshot from the ROSEAU RIVER gauge is also available on this page.

Regional Context

Roseau County has poorer water quality than the average county in Minnesota. Its water score is 59.8 points lower than the state average, suggesting more challenges with contamination control or infrastructure than neighboring counties.

Advisory text summarizes county-level public records and is not a replacement for your utility's current Consumer Confidence Report or direct local notices.

Contaminants & Resources

Key issues flagged in Roseau County's water environment

Official EPA Resources for Roseau County

EPA How's My Waterway

Interactive watershed health data for Roseau County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Roseau County

Consumer Confidence Reports (MN)

Annual water quality reports from utilities in Minnesota

Past 5 years

Water Quality Monitoring

Monitoring Sites

18

Active in the past 5 years

Measurements Recorded

1.6K

1,600 total readings

Most Measured

  • Physical
  • Nutrient
  • Microbiological

Categories measured most frequently

Data from the EPA Water Quality Portal (WQP), aggregating monitoring records from federal, state, and tribal sources. Each measurement represents a single sample analyzed for a specific characteristic (e.g., E. coli, pH, dissolved oxygen, nitrogen).

Live USGS Streamgage

River & Stream Conditions

Current Discharge

418cfs

May 14, 7:00 PM UTC

vs Long-Term Average

134%

Well above typical

Primary Streamgage

ROSEAU RIVER AT ROSS, MN

USGS site
05107500
Drainage area
1,090 sq mi
Long-term mean
313 cfs

One representative streamgage (the one with the largest drainage area in the county). Many counties have multiple gauges; this view summarizes the primary one. The long-term mean is the full-record annual average; the percent-of-typical value compares the latest reading against that average.

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Water Cost Estimate

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Annual Total

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Monthly

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Water Bill

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Filter Cost

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Safety Grade for Roseau County:F — Failing

High violation count or severe watershed conditions.

Estimates use the national average residential water rate ($0.0068/gal, EPA/AWWA 2023) and EPA WaterSense per-person consumption baseline (75 gal/person/day). Actual bills vary by utility, usage tier, and local infrastructure fees. For informational purposes only.

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Frequently Asked Questions

What is the water quality in Roseau County, Minnesota?
Roseau County, Minnesota has a drinking-water quality grade of F with a score of 7.4/100, based on EPA SDWIS compliance data. The county has 34 health-based drinking water violations over the past 5 years. Watershed health, monitoring records, and streamflow snapshots are reported separately on this page.
Are there any water violations in Roseau County?
Roseau County has 34 health-based drinking water violations recorded by the EPA over the past 5 years. Health-based violations indicate instances where contaminant levels exceeded EPA Maximum Contaminant Levels (MCLs). Violations may have been resolved — check with your local water utility for current status.
How much water-quality monitoring happens in Roseau County?
EPA's Water Quality Portal records 1,600 measurements from 18 monitoring sites in Roseau County over the past five years. The most frequently measured characteristic groups are Physical, Nutrient, Microbiological. Each measurement is a single sample analyzed for one characteristic (E. coli, pH, dissolved oxygen, etc.). High monitoring density means more scientific evidence behind any reported signal — it does not by itself indicate water quality.
What's happening with rivers in Roseau County right now?
Roseau County's primary USGS streamgage on the ROSEAU RIVER has a pipeline snapshot of 418 cubic feet per second — 134% of the long-term mean of 313.09 cfs. This is well above typical — often a signal of recent precipitation or storm runoff. For the latest gauge feed, visit waterdata.usgs.gov.
How does Roseau County water compare to the Minnesota average?
Roseau County's SDWIS water quality score of 7.4/100 is lower than the Minnesota state average of 67.2. The average water quality grade across Minnesota is C, based on data from 87 counties with available SDWIS data.
Is tap water safe to drink in Roseau County?
Based on EPA SDWIS data, Roseau County has a water quality grade of F (7.4/100). This indicates below-average compliance with significant violations. Residents may want to consider home water filtration or independent testing. The grade speaks to the public water system, not the watershed — for watershed-level concerns, see the Watershed Health zone. For the most up-to-date information, contact your local water utility or review your Consumer Confidence Report (CCR).
Why does Roseau County have so many water violations?
Roseau County has 34 health-based drinking water violations on record from the EPA SDWIS database. A higher violation count can result from aging infrastructure, underfunded water utilities, agricultural runoff contamination, or industrial pollution. Counties with more water systems may also see more violations simply due to scale. Residents concerned about water quality should consider independent water testing and home filtration systems.
How does Roseau County rank for water quality in Minnesota?
Roseau County ranks #86 out of 87 counties in Minnesota by SDWIS water quality score (1 = best). With a score of 7.4/100, it falls in the bottom third of counties statewide. The ranking reflects EPA SDWIS compliance only — not watershed impairment, monitoring density, or streamflow, which are tracked separately on this page.

Counties with Similar Water Quality

Sibley County

Minnesota

F

5.5

Water score

Otter Tail County

Minnesota

F

12.0

Water score

Traverse County

Minnesota

F

16.0

Water score

Data Sources

Drinking-water compliance data from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. Scores reflect compliance history and health-based violation counts.

Water-quality monitoring counts from the EPA Water Quality Portal (WQP), federated USGS, EPA, and state agency sampling records over a rolling 5-year window.

Live streamflow from the USGS National Water Information System (NWIS), continuous discharge measurements from the largest-drainage gauge in each county, compared against the full-record long-term annual mean.

Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.

By Evan Brooks, Data EditorUpdated Reviewed by Evan Brooks, Data Editor

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