County water report

Bryan County Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Bryan County, Oklahoma.

Water grade

Water score

7.5

State rank

#40

of 77

Health violations

185

EPA SDWIS, 5-year lookback

Watershed impaired

Not reported

EPA ATTAINS coverage varies by state

Monitoring sites

26,681 recent measurements

Live streamflow

31%

Blue River near Blue, OK

Water at a glance

Key Water Indicators for Bryan County

EPA SDWIS

Safety Grade

Score: 7.5 / 100

EPA SDWIS

Active Violations

185

5-year health-based lookback

EPA ATTAINS

Watershed Health

Not reported

Coverage varies by state

USGS NWIS

Streamflow Snapshot

31% of mean

Blue River near Blue, OK

EPA WQP

Monitoring Sites

26,681 recent readings

Source: EPA SDWIS · Safe Drinking Water Information System

Drinking Water Compliance

Compliance grade

Based on EPA SDWIS compliance history.

Water score

Higher scores indicate cleaner recent compliance records.

7.5/100

Health violations

185

Health-based violations

Violations per 100K served

467.0

Population-normalized SDWIS rate

Data center water stress

Bryan County has 1 facility in the DCWSI dataset.

ByCounty's DCWSI ranks this county #2837 nationally by combining its water score with mapped data center density.

DCWSI

4.5

0-100 index

Facility count

0.0 density percentile

Discharge estimate

Not reported

EPA CWA fields where available

Water vs median

-42.5

Compared with US county median

Named operators

Choctaw Nation of oklahoma

Mapped facilities

Choctaw Nation of Oklahoma Data Center
Durant · Choctaw Nation of oklahoma
OSM

See the Bryan County data-center report Review methodology

Data Center Water Budget Calculator

Estimate daily water use for a hypothetical facility in Bryan County.

Facility size: 100 MW

1 MW1,000 MW

Cooling type

Utilization: 70%

40%100%

799K gallons/dayHigh Impact

Your facility would use 317.3% of this county's industrial water baseline. Verify water rights and long-term drought projections before committing.

317.3% of county industrial baseline

Based on USGS 2020 water-use data and EPA-standard cooling intensity constants. Not a substitute for site-specific water rights analysis.

Editorial analysis

Understanding Bryan County’s Water

Drinking Water Quality Overview

EPA SDWIS

Bryan County's water systems carry a failing grade, scoring 7.5 out of 100. Over the past five years, EPA SDWIS records 185 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 2026-05-14T13:30:00.000-05:00) puts Blue River at 99.8 cfs — well below its long-term average at 31% of mean — low-flow conditions worth noting for water-dependent ecosystems. 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. Bryan County has moderate coverage with 23 active monitoring sites with 26,681 recent measurements on record. Predominant monitoring categories include physical and not assigned. 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 Bryan County

Water Verdict

Bryan County receives a poor water quality assessment with a grade of F and a score of 7.5 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

Bryan County has recorded 185 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 467.0 violations per 100,000 people served, this rate is high and signals significant water quality management issues.

Consumer Guidance

Bryan County has a Grade F compliance record with 185 health-based violations — among the highest levels in the country. Bryan County's drinking-water compliance score is 7.5 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 Oklahoma Department of Environmental Quality or Health can expedite utility compliance action. With 23 active water-quality monitoring sites in Bryan County, data coverage is strong. A pipeline streamflow snapshot from the Blue River gauge is also available on this page.

Regional Context

Bryan County has poorer water quality than the average county in Oklahoma. Its water score is 8.3 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 Bryan County's water environment

Official EPA Resources for Bryan County

EPA How's My Waterway

Interactive watershed health data for Bryan County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Bryan County

Consumer Confidence Reports (OK)

Annual water quality reports from utilities in Oklahoma

Past 5 years

Water Quality Monitoring

Monitoring Sites

Active in the past 5 years

Measurements Recorded

27K

26,681 total readings

Most Measured

Physical
Not Assigned
Inorganics, Major, Non-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

99.8cfs

May 14, 6:30 PM UTC

vs Long-Term Average

31%

Well below typical

Primary Streamgage

Blue River near Blue, OK

USGS site: 07332500
Drainage area: 477 sq mi
Long-term mean: 322 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.

Free tool

Estimate Your Water Costs

Water Cost Estimate

Household size

3 people · ~225 gal/day

Filter type

Annual Total

$558

Monthly

$47

Water Bill

$558/yr

Filter Cost

$0/yr

Safety Grade for Bryan 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 Bryan County, Oklahoma?

Bryan County, Oklahoma has a drinking-water quality grade of F with a score of 7.5/100, based on EPA SDWIS compliance data. The county has 185 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 Bryan County?

Bryan County has 185 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 Bryan County?

EPA's Water Quality Portal records 26,681 measurements from 23 monitoring sites in Bryan County over the past five years. The most frequently measured characteristic groups are Physical, Not Assigned, Inorganics, Major, Non-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 Bryan County right now?

Bryan County's primary USGS streamgage on the Blue River has a pipeline snapshot of 99.8 cubic feet per second — 31% of the long-term mean of 322.09 cfs. This is well below typical — often a signal of drought stress on source water. For the latest gauge feed, visit waterdata.usgs.gov.

How does Bryan County water compare to the Oklahoma average?

Bryan County's SDWIS water quality score of 7.5/100 is lower than the Oklahoma state average of 15.8. The average water quality grade across Oklahoma is F, based on data from 77 counties with available SDWIS data.

Is tap water safe to drink in Bryan County?

Based on EPA SDWIS data, Bryan County has a water quality grade of F (7.5/100). 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).

Why does Bryan County have so many water violations?

Bryan County has 185 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 Bryan County rank for water quality in Oklahoma?

Bryan County ranks #40 out of 77 counties in Oklahoma by SDWIS water quality score (1 = best). With a score of 7.5/100, it falls in the middle 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

Johnston County

Oklahoma

7.2

Water score

Roger Mills County

Oklahoma

6.9

Water score

Alfalfa County

Oklahoma

8.4

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 May 14, 2026Reviewed by Evan Brooks, Data Editor

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