KNOXVILLE UTILITIES BOARD - KUB

KNOXVILLE, TN · ~254,671 people served

Check your exact address → KNOXVILLE overview

100

Excellent

PurityRadar safety score

PWSID

TN0000366

State

Tennessee

City

KNOXVILLE

Population served

254,671

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 Apr 2024). Levels in parts per trillion (ppt).

PFBS

3.7 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Other · EPA contaminant 0300 began Dec 2018 Resolved

Max contaminant level (MCL) · Total coliform health-based began Sep 2012 Resolved

Other · EPA contaminant 7000 began Jul 2008 Resolved

Recent enforcement actions

State action · SOX Nov 2021
State action · SIF Apr 2019
State action · SIA Feb 2019
State action · SIE Feb 2019
State action · SFK Apr 2013
State action · SOX Oct 2012
State action · SIE Oct 2012
State action · SIA Oct 2012

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

10 stations · latest Mar 2026

56.9 · max 472 ug/L · 122

Copper

8 stations · latest Feb 2026

0.831 · max 12.3 ug/L · 90

Arsenic

9 stations · latest Feb 2026

0.537 · max 1.37 ug/L · 78

Lead

9 stations · latest Feb 2026

0.468 · max 2.66 ug/L · 73

Nitrate

5 stations · latest Nov 2025

0.414 · max 1.51 mg/L · 39

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 TN0000366 — 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.