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Federal water data

County water report

Miner County Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Miner County, South Dakota.

Water grade

F

Water score

22.5

State rank

#52

of 63

Health violations

1

EPA SDWIS, 5-year lookback

Watershed impaired

Not reported

EPA ATTAINS coverage varies by state

Monitoring sites

N/A

EPA Water Quality Portal

Live streamflow

No gauge

Primary USGS station not mapped

Water at a glance

Key Water Indicators for Miner County

EPA SDWIS

Safety Grade

F

Score: 22.5 / 100

EPA SDWIS

Active Violations

1

5-year health-based lookback

EPA ATTAINS

Watershed Health

Not reported

Coverage varies by state

USGS NWIS

Streamflow Snapshot

No gauge

Primary USGS gauge not mapped

EPA WQP

Monitoring Sites

N/A

Rolling 5-year window

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.

22.5/100

Health violations

1

Health-based violations

Violations per 100K served

106.7

Population-normalized SDWIS rate

Editorial analysis

Understanding Miner County’s Water

Drinking Water Quality Overview

EPA SDWIS

Miner County's water systems carry a failing grade, scoring 22.5 out of 100. Over the past five years, EPA SDWIS records 1 health-based violation — a single incident worth monitoring.

Editorial advisory

What the data suggests for Miner County

Water Verdict

Miner County receives a poor water quality assessment with a grade of F and a score of 22.5 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.

Violation Context

Miner County has recorded 1 health-based violation, meaning the water system experienced at least one exceedance of federal contaminant limits or treatment requirements. At 106.7 violations per 100,000 people served, this rate is high and signals significant water quality management issues.

Consumer Guidance

Drinking-water compliance in Miner County is rated Grade F, reflecting significant health-based violations in the recent reporting period. Miner County's drinking-water compliance score is 22.5 out of 100. An NSF 53 or NSF 58-certified filter is recommended for drinking and cooking water. Check the Consumer Confidence Report from your utility to identify the specific contaminants and required corrective actions — utilities are legally required to notify customers of violations.

Regional Context

Miner County has poorer water quality than the average county in South Dakota. Its water score is 34.3 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 Miner County's water environment

Official EPA Resources for Miner County

EPA How's My Waterway

Interactive watershed health data for Miner County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Miner County

Consumer Confidence Reports (SD)

Annual water quality reports from utilities in South Dakota

Free tool

Estimate Your Water Costs

Water Cost Estimate

3

3 people  ·  ~225 gal/day

Annual Total

$558

Monthly

$47

Water Bill

$558/yr

Filter Cost

$0/yr

Safety Grade for Miner 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 Miner County, South Dakota?
Miner County, South Dakota has a drinking-water quality grade of F with a score of 22.5/100, based on EPA SDWIS compliance data. The county has 1 health-based drinking water violation over the past 5 years. Watershed health, monitoring records, and streamflow snapshots are reported separately on this page.
Are there any water violations in Miner County?
Miner County has 1 health-based drinking water violation 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 does Miner County water compare to the South Dakota average?
Miner County's SDWIS water quality score of 22.5/100 is lower than the South Dakota state average of 56.8. The average water quality grade across South Dakota is D, based on data from 63 counties with available SDWIS data.
Is tap water safe to drink in Miner County?
Based on EPA SDWIS data, Miner County has a water quality grade of F (22.5/100). 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).
Does Miner County have clean drinking water?
Miner County has 1 health-based drinking water violation according to EPA records. With a water quality score of 22.5/100 and grade F, the county's drinking water has had some compliance issues but continues to be monitored. Note: drinking-water compliance speaks to the public water system, not necessarily to the watershed itself — check the Watershed Health zone for ATTAINS §303(d) data.
How does Miner County rank for water quality in South Dakota?
Miner County ranks #52 out of 63 counties in South Dakota by SDWIS water quality score (1 = best). With a score of 22.5/100, 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

Fall River County

South Dakota

F

21.4

Water score

Brule County

South Dakota

F

21.0

Water score

Tripp County

South Dakota

F

24.6

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.

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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