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Federal water data

County water report

Giles County Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Giles County, Tennessee.

Water grade

D

Water score

42.3

State rank

#81

of 95

Health violations

10

EPA SDWIS, 5-year lookback

Watershed impaired

24.5%

94 water bodies assessed

Monitoring sites

34

7,960 recent measurements

Live streamflow

29%

ELK RIVER AT PROSPECT, TN

Water at a glance

Key Water Indicators for Giles County

EPA SDWIS

Safety Grade

D

Score: 42.3 / 100

EPA SDWIS

Active Violations

10

5-year health-based lookback

EPA ATTAINS

Watershed Health

25% impaired

94 bodies assessed

USGS NWIS

Streamflow Snapshot

29% of mean

ELK RIVER AT PROSPECT, TN

EPA WQP

Monitoring Sites

34

7,960 recent readings

Source: EPA SDWIS · Safe Drinking Water Information System

Drinking Water Compliance

Compliance grade

D

Based on EPA SDWIS compliance history.

Water score

Higher scores indicate cleaner recent compliance records.

42.3/100

Health violations

10

Health-based violations

Violations per 100K served

28.2

Population-normalized SDWIS rate

Editorial analysis

Understanding Giles County’s Water

Drinking Water Quality Overview

EPA SDWIS

Giles County's drinking water received a D grade, scoring 42.3 out of 100. Over the past five years, EPA SDWIS records 10 health-based violations — a pattern that public water utilities are required to disclose and correct.

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 notable 24.5% of assessed waterways carry an impairment designation (23 of 94 water bodies) across Giles County's watersheds. The leading impairment causes are alteration in stream-side or littoral vegetative covers and sedimentation/siltation. 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 2026-05-14T13:15:00.000-05:00) puts ELK RIVER at 920.0 cfs — well below its long-term average at 29% 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. Giles County has moderate coverage with 34 active monitoring sites with 7,960 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 Giles County

Water Verdict

Giles County receives a below-average water quality assessment with a grade of D and a score of 42.3 out of 100. Residents should review their utility's Consumer Confidence Report and may want to consider additional water filtration for drinking.

Violation Context

Giles County has recorded 10 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 28.2 violations per 100,000 people served, this rate is high and signals significant water quality management issues.

Consumer Guidance

Giles County's drinking-water compliance is below average with a Grade D, indicating repeated or unresolved violations in the recent record. Giles County's drinking-water compliance score is 42.3 out of 100. The violation rate for Giles County is 28.2 per 100,000 people served. Residents are encouraged to use an NSF 53 or NSF 58-certified filter for drinking and cooking water until the underlying violations are resolved. Running tap water for 30 seconds before use and avoiding older lead-pipe connections can also reduce exposure risk. The current Consumer Confidence Report from your utility will specify the contaminants of concern. Alteration in Stream-Side or Littoral Vegetative Covers is the leading impairment cause in Giles County's watershed. With 34 active water-quality monitoring sites in Giles County, data coverage is strong. A pipeline streamflow snapshot from the ELK RIVER gauge is also available on this page.

Regional Context

Giles County has poorer water quality than the average county in Tennessee. Its water score is 29 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 Giles County's water environment

Watershed Impairment Causes (EPA ATTAINS)

  • 1

    Alteration in Stream-Side Or Littoral Vegetative Covers

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

  • 2

    Sedimentation and siltation

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

  • 3

    E. coli (bacteria)

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

Source: EPA ATTAINS · Reporting cycle 2022

Official EPA Resources for Giles County

EPA How's My Waterway

Interactive watershed health data for Giles County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Giles County

Consumer Confidence Reports (TN)

Annual water quality reports from utilities in Tennessee

Clean Water Act §303(d)

Watershed Health

Impaired Water Bodies

24.5%

23 of 94 assessed

Some impairment

Top Impairment Causes

  • 1

    ALTERATION IN STREAM-SIDE OR LITTORAL VEGETATIVE COVERS

  • 2

    SEDIMENTATION/SILTATION

  • 3

    ESCHERICHIA COLI (E. COLI)

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

34

Active in the past 5 years

Measurements Recorded

8.0K

7,960 total readings

Most Measured

  • Physical
  • Nutrient
  • Biological, Counts

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

920cfs

May 14, 6:15 PM UTC

vs Long-Term Average

29%

Well below typical

Primary Streamgage

ELK RIVER AT PROSPECT, TN

USGS site
03584600
Drainage area
1,805 sq mi
Long-term mean
3,184 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

3

3 people  ·  ~225 gal/day

Annual Total

$558

Monthly

$47

Water Bill

$558/yr

Filter Cost

$0/yr

Safety Grade for Giles 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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Frequently Asked Questions

What is the water quality in Giles County, Tennessee?
Giles County, Tennessee has a drinking-water quality grade of D with a score of 42.3/100, based on EPA SDWIS compliance data. The county has 10 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 Giles County?
Giles County has 10 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 healthy are the watersheds in Giles County?
EPA ATTAINS assessments under Clean Water Act §303(d) indicate 24.5% of Giles County's 94 assessed water bodies are classified as impaired (23 impaired). The top reported causes are ALTERATION IN STREAM-SIDE OR LITTORAL VEGETATIVE COVERS, SEDIMENTATION/SILTATION, ESCHERICHIA COLI (E. COLI). 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 Giles County?
EPA's Water Quality Portal records 7,960 measurements from 34 monitoring sites in Giles County over the past five years. The most frequently measured characteristic groups are Physical, Nutrient, Biological, Counts. 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 Giles County right now?
Giles County's primary USGS streamgage on the ELK RIVER has a pipeline snapshot of 920 cubic feet per second — 29% of the long-term mean of 3,183.99 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 Giles County water compare to the Tennessee average?
Giles County's SDWIS water quality score of 42.3/100 is lower than the Tennessee state average of 71.3. The average water quality grade across Tennessee is C, based on data from 95 counties with available SDWIS data.
Is tap water safe to drink in Giles County?
Based on EPA SDWIS data, Giles County has a water quality grade of D (42.3/100). 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 Giles County have so many water violations?
Giles County has 10 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 Giles County rank for water quality in Tennessee?
Giles County ranks #81 out of 95 counties in Tennessee by SDWIS water quality score (1 = best). With a score of 42.3/100, 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

Bledsoe County

Tennessee

D

42.5

Water score

Roane County

Tennessee

D

46.5

Water score

Bedford County

Tennessee

F

37.5

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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