PurityMap
Search city, ZIP, contaminant⌘KFind my water
Updated 2026-09-16
County water report

Loudon County Water Quality: 2 Cities Ranked by the Records

Loudon County, Tennessee: 2 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my systemOpen on the mapPrivate wells in Loudon County
Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

Perfluorooctanesulfonic acid (PFOS)Detected in 1 system of 2 tested4.0 ng/L federal MCL (2024) · US EPAHighest4.6 ng/L
Lead (90th percentile)Detected in 2 systems15 µg/L federal action level · US EPAHighest1 µg/L
Perfluorobutanesulfonic acid (PFBS)Detected in 1 system of 2 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest6.2 ng/L
Perfluorohexanoic acid (PFHxA)Detected in 1 system of 2 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest4.6 ng/L
Perfluoropentanoic acid (PFPeA)Detected in 1 system of 2 testedNo federal or state limit; shown for transparencyHighest3.2 ng/L
26 substances tested, none detected in any systemShow

Tested in these 2 systems: LENOIR CITY UTILITY BOARD, LOUDON UTILITIES BOARD

  • 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
  • 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
  • 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
  • 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
  • Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
  • Lithium
  • N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
  • N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
  • Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
  • Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
  • Perfluoro-3-methoxypropanoic acid (PFMPA)
  • Perfluoro-4-methoxybutanoic acid (PFMBA)
  • Perfluorobutanoic acid (PFBA)
  • Perfluorodecanoic acid (PFDA)
  • Perfluorododecanoic acid (PFDoA)
  • Perfluoroheptanesulfonic acid (PFHpS)
  • Perfluoroheptanoic acid (PFHpA)
  • Perfluorohexanesulfonic acid (PFHxS)
  • Perfluorononanoic acid (PFNA)
  • Perfluorooctanoic acid (PFOA)
  • Perfluoropentanesulfonic acid (PFPeS)
  • Perfluorotetradecanoic acid (PFTA)
  • Perfluorotridecanoic acid (PFTrDA)
  • Perfluoroundecanoic acid (PFUnA)
2 cities

Cities ranked by the records

Showing 2 of 2 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.

PFAS in Loudon County1 of 2 cities report a regulated PFAS above the federal limit
  1. Lenoir City4.6 ng/L
4.0 ng/L federal MCL · PFOS, ng/LPFAS in Tennessee
Lead

0of 2 cities above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in Tennessee
Who supplies the county

Largest water systems

  1. Lenoir CityLENOIR CITY UTILITY BOARD · TN0000396
    34,786 served
  2. LoudonLOUDON UTILITIES BOARD · TN0000409
    16,047 served
Questions

Frequently asked

How does Loudon County tap water compare across cities?

PurityMap ranks 2 cities in Loudon County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Loudon's main water system: LOUDON UTILITIES BOARD · PWSID TN0000409 · Purity Score 99 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Loudon County cities have PFAS above the federal limit?

1 city of 2 had at least one regulated PFAS (PFOA, PFOS or PFHxS) measured above the 2024 federal limit in EPA's UCMR 5 testing, including Lenoir City (PFOS 4.6 ng/L). PFAS were detected at any level in 1.

Is there lead in Loudon County tap water?

Utilities report lead as a 90th-percentile result from home taps. 2 of 2 Loudon County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

Next step

Follow Loudon County's water

Get an email when a city record in the county changes. Or go straight to the filters certified for what was found here.

Filters certified for PFAS
FOLLOW THIS COUNTY

Record changes only

We email when places in Loudon County get new results. Unsubscribe any time.

Double opt-in: we email a confirmation link. Unsubscribe anytime. No spam.