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Water system · PWSID TN0000369

FIRST U.D. OF KNOX COUNTY

KNOXVILLE, TN · ~115,531 people served

Check your exact address → KNOXVILLE overview
100
Excellent
PurityRadar safety score

PWSID

TN0000369

State

Tennessee

City

KNOXVILLE

Population served

115,531

Primary source

Surface water

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Feb 2024). Levels in parts per trillion (ppt).

PFBS

6.4 ppt

limit —

No federal limit

PFHxA

3 ppt

limit —

No federal limit

Violations & enforcement

5

Violations on record

1

Unaddressed

1

Health-based

19

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2021. Official EPA record →

Other · EPA contaminant 0300 began Sep 2018 Unaddressed
Other · EPA contaminant 0300 began Jul 2016 Resolved
Monitoring & reporting · EPA contaminant 0200 began Jun 2014 Resolved
Treatment technique · EPA contaminant 0300 health-based began Jul 2008 Resolved
Other · EPA contaminant 7000 began Jul 2002 Resolved

Recent enforcement actions

  • State action · SOX Jun 2021
  • State action · SIF Jun 2019
  • State action · SIF Jun 2017
  • State action · SIA Sep 2016
  • State action · SIE Sep 2016
  • State action · SIF May 2015
  • State action · SOX May 2015
  • State action · SIE Apr 2015

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Manganese

1 station · latest May 2023

21 · max 65.5 ug/L · 18

Copper

1 station · latest Feb 2023

0.318 · max 1.36 ug/L · 6

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system TN0000369 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.