waterbycounty
EPA SDWIS

Emery County Water Quality

Emery County, Utah

Water Grade

F

Water Score

35.1

Violations

5

State Rank

#17

of 29 (1 = best)

EPA SDWIS Compliance

Drinking Water Quality

Water Quality Grade

F

Based on EPA compliance history and violation data

Water Score

35.1/100

Higher = better quality

Health Violations

5

Health-based violations

Violation Rate

46.6%

Systems with violations

Water Advisory: Emery County

Water Verdict

Emery County receives a poor water quality assessment with a grade of F and a score of 35.1 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

Emery County has recorded 5 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 46.6 violations per 1,000 residents, this rate is high and signals significant water quality management issues.

Consumer Guidance

Residents of Emery County are advised to use filtered or bottled water for drinking and cooking until water quality improves. A reverse-osmosis or activated-carbon filter certified to remove the contaminants listed in the utility's Consumer Confidence Report is recommended. With 5 recorded health violations, staying informed about utility communications and boil-water notices is especially important. For long-term peace of mind, request your utility's latest Consumer Confidence Report and consider independent water testing if you have specific health concerns.

Regional Context

Emery County has poorer water quality than the average county in Utah. Its water score is 12.6 points lower than the state average, suggesting more challenges with contamination control or infrastructure than neighboring counties.

Past 5 years

Water Quality Monitoring

Monitoring Sites

76

Active in the past 5 years

Measurements Recorded

22K

22,331 total readings

Most Measured

  • Physical
  • Not Assigned
  • 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

9,870cfs

May 14, 7:00 PM UTC

vs Long-Term Average

168%

Well above typical

Primary Streamgage

GREEN RIVER AT GREEN RIVER, UT

USGS site
09315000
Drainage area
44,850 sq mi
Long-term mean
5,874 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; "% of typical" compares the latest reading against that average.

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Frequently Asked Questions

What is the water quality in Emery County, Utah?
Emery County, Utah has a drinking-water quality grade of F with a score of 35.1/100, based on EPA SDWIS compliance data. The county has 5 health-based drinking water violations over the past 5 years. Watershed health, monitoring records, and live streamflow are reported separately on this page.
Are there any water violations in Emery County?
Emery County has 5 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 Emery County?
EPA's Water Quality Portal records 22,331 measurements from 76 monitoring sites in Emery County over the past five years. The most frequently measured characteristic groups are Physical, Not Assigned, 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 Emery County right now?
Emery County's primary USGS streamgage on the GREEN RIVER is currently reading 9,870 cubic feet per second — 168% of the long-term mean of 5,873.69 cfs. This is well above typical — often a signal of recent precipitation or storm runoff. For genuine real-time data, visit waterdata.usgs.gov.
How does Emery County water compare to the Utah average?
Emery County's SDWIS water quality score of 35.1/100 is lower than the Utah state average of 47.7. The average water quality grade across Utah is D, based on data from 29 counties with available SDWIS data.
Is tap water safe to drink in Emery County?
Based on EPA SDWIS data, Emery County has a water quality grade of F (35.1/100). 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 Emery County have clean drinking water?
Emery County has 5 health-based drinking water violations according to EPA records. With a water quality score of 35.1/100 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 Emery County rank for water quality in Utah?
Emery County ranks #17 out of 29 counties in Utah by SDWIS water quality score (1 = best). With a score of 35.1/100, 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

Washington County

Utah

F

35.1

Water score

Summit County

Utah

F

34.2

Water score

Kane County

Utah

F

31.6

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.

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 Logan Johnson, Founder & Data EditorUpdated Reviewed by Logan Johnson, Founder & Data Editor

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