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County water report

Griggs County Water Report

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

Water grade

A

Water score

86.0

State rank

#14

of 52

Health violations

0

EPA SDWIS, 5-year lookback

Watershed impaired

36.4%

22 water bodies assessed

Monitoring sites

12

8,715 recent measurements

Live streamflow

115%

SHEYENNE RIVER NR COOPERSTOWN, ND

Water at a glance

Key Water Indicators for Griggs County

EPA SDWIS

Safety Grade

A

Score: 86.0 / 100

EPA SDWIS

Active Violations

0

5-year health-based lookback

EPA ATTAINS

Watershed Health

36% impaired

22 bodies assessed

USGS NWIS

Streamflow Snapshot

115% of mean

SHEYENNE RIVER NR COOPERSTOWN, ND

EPA WQP

Monitoring Sites

12

8,715 recent readings

Source: EPA SDWIS · Safe Drinking Water Information System

Drinking Water Compliance

Compliance grade

A

Based on EPA SDWIS compliance history.

Water score

Higher scores indicate cleaner recent compliance records.

86.0/100

Health violations

0

Health-based violations

Violations per 100K served

0.0

Population-normalized SDWIS rate

Editorial analysis

Understanding Griggs County’s Water

Drinking Water Quality Overview

EPA SDWIS

Griggs County earns an A grade for drinking water quality, scoring 86.0 out of 100. EPA's Safe Drinking Water Information System (SDWIS) records zero health-based violations over the past five years — a strong compliance signal for a small county.

Watershed Conditions

EPA ATTAINS

Under the Clean Water Act §303(d), EPA ATTAINS tracks whether waterways meet quality standards for drinking, recreation, and aquatic life (reporting cycle: 2022). A substantial 36.4% of assessed waterways are impaired (8 of 22 water bodies) across Griggs County's watersheds. The leading impairment causes are escherichia coli (e. coli) and nutrients. Impairment does not mean tap water is unsafe — it measures ambient waterway conditions upstream of treatment, not finished drinking water.

River & Streamflow Status

USGS NWIS

USGS NWIS gauge data (as of 2026-05-14T14:00:00.000-05:00) puts SHEYENNE RIVER at 226.0 cfs — flowing above its historical average at 115% 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. Griggs County has moderate coverage with 12 active monitoring sites with 8,715 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 Griggs County

Water Verdict

Griggs County, North Dakota receives an excellent water quality assessment with a grade of A and a score of 86.0 out of 100. The water supply meets or exceeds federal safety standards, and residents can generally drink tap water with confidence. Separately, EPA ATTAINS assessments cover 22 water bodies in the county's watershed, with 36.4% listed as impaired under the Clean Water Act — a source-water measure that is tracked independently of tap-water compliance. At the most recent USGS reading, local streamflow was running above its historical mean at 114.8%.

Violation Context

EPA SDWIS records for Griggs County, North Dakota show zero health-based violations, indicating that the county's water systems met all federal safety standards during the reporting period. The violation rate is zero per 100,000 people served, which is the best possible outcome. For independent context, 8,715 water-quality monitoring results have been recorded across the county in the EPA Water Quality Portal over the past five years.

Consumer Guidance

The EPA compliance record for Griggs County shows no recent health-based violations. Griggs County's drinking-water compliance score is 86.0 out of 100. Watershed monitoring does show E. coli in local surface water — a reminder that treated drinking water and source-water quality are measured separately. Reviewing your utility's annual Consumer Confidence Report each July confirms that treatment is keeping pace with any upstream pressures. With 12 active water-quality monitoring sites in Griggs County, data coverage is strong. A pipeline streamflow snapshot from the SHEYENNE RIVER gauge is also available on this page.

Regional Context

Griggs County has better water quality than the average county in North Dakota. Its water score is 14.4 points higher than the state average, indicating stronger water system performance relative to 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 Griggs County's water environment

Watershed Impairment Causes (EPA ATTAINS)

  • 1

    E. coli (bacteria)

    Impairment cause per EPA Clean Water Act §303(d) assessment

  • 2

    Nutrient pollution

    Impairment cause per EPA Clean Water Act §303(d) assessment

  • 3

    Benthic Macroinvertebrates Bioassessments

    Impairment cause per EPA Clean Water Act §303(d) assessment

Source: EPA ATTAINS · Reporting cycle 2022

Official EPA Resources for Griggs County

EPA How's My Waterway

Interactive watershed health data for Griggs County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Griggs County

Consumer Confidence Reports (ND)

Annual water quality reports from utilities in North Dakota

Clean Water Act §303(d)

Watershed Health

Impaired Water Bodies

36.4%

8 of 22 assessed

Moderate concern

Top Impairment Causes

  • 1

    ESCHERICHIA COLI (E. COLI)

  • 2

    NUTRIENTS

  • 3

    BENTHIC MACROINVERTEBRATES BIOASSESSMENTS

Source: EPA ATTAINS · Reporting cycle 2022

Impairment is determined under the Clean Water Act §303(d): a water body is impaired when it fails to meet state-defined quality standards for designated uses (drinking, recreation, aquatic life). Assessment coverage varies by state; counties without assessed water bodies are not shown.

Past 5 years

Water Quality Monitoring

Monitoring Sites

12

Active in the past 5 years

Measurements Recorded

8.7K

8,715 total readings

Most Measured

  • Physical
  • Nutrient
  • Inorganics, Minor, Metals

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

226cfs

May 14, 7:00 PM UTC

vs Long-Term Average

115%

Above typical

Primary Streamgage

SHEYENNE RIVER NR COOPERSTOWN, ND

USGS site
05057000
Drainage area
6,470 sq mi
Long-term mean
197 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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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 Griggs County:C — Moderate

Some violations or watershed impairment detected.

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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Griggs County has good water quality

Learn about water restrictions and conservation in your area.

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Frequently Asked Questions

What is the water quality in Griggs County, North Dakota?
Griggs County, North Dakota has a drinking-water quality grade of A with a score of 86.0/100, based on EPA SDWIS compliance data. The county has 0 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 Griggs County?
Griggs County has 0 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). Zero violations is an excellent record indicating consistent compliance with federal drinking water standards.
How healthy are the watersheds in Griggs County?
EPA ATTAINS assessments under Clean Water Act §303(d) indicate 36.4% of Griggs County's 22 assessed water bodies are classified as impaired (8 impaired). The top reported causes are ESCHERICHIA COLI (E. COLI), NUTRIENTS, BENTHIC MACROINVERTEBRATES BIOASSESSMENTS. Impairment means the water body fails to meet state quality standards for at least one designated use — drinking water source, recreation, aquatic life, or fish consumption. Note: watershed impairment doesn't always translate to tap-water issues; treatment plants can remove most regulated contaminants.
How much water-quality monitoring happens in Griggs County?
EPA's Water Quality Portal records 8,715 measurements from 12 monitoring sites in Griggs County over the past five years. The most frequently measured characteristic groups are Physical, Nutrient, Inorganics, Minor, Metals. 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 Griggs County right now?
Griggs County's primary USGS streamgage on the SHEYENNE RIVER has a pipeline snapshot of 226 cubic feet per second — 115% of the long-term mean of 196.91 cfs. Flow is within typical range for this gauge. For the latest gauge feed, visit waterdata.usgs.gov.
How does Griggs County water compare to the North Dakota average?
Griggs County's SDWIS water quality score of 86.0/100 is higher than the North Dakota state average of 71.6. The average water quality grade across North Dakota is C, based on data from 52 counties with available SDWIS data.
Is tap water safe to drink in Griggs County?
Based on EPA SDWIS data, Griggs County has a water quality grade of A (86.0/100). This indicates good to excellent water quality with strong SDWIS compliance. 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 Griggs County have clean drinking water?
Griggs County has 0 health-based drinking water violations according to EPA records. With a water quality score of 86.0/100 and grade A, the county's drinking water meets EPA standards with no recorded health violations. 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 Griggs County rank for water quality in North Dakota?
Griggs County ranks #14 out of 52 counties in North Dakota by SDWIS water quality score (1 = best). With a score of 86.0/100, it falls in the top 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

Adams County

North Dakota

A

86.0

Water score

Barnes County

North Dakota

A

86.0

Water score

Billings County

North Dakota

A

86.0

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.

Watershed health and impaired-waterway data from the EPA ATTAINS Clean Water Act §303(d) assessments, state-reported and EPA-finalized.

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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