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Hamilton County Wastewater Treatment Authority, Signal Mountain STP

1250 Market St., Ste. 3050, Chattanooga, TN 37402 · Hamilton County · Publicly Owned Treatment Works

Average flow
0.54 MGD
Design flow
0.4 MGD
NPDES permit
TN0021211
Effective
Permit expires
March 2029
Population served
8,411
CWNS 2022

Hamilton County Wastewater Treatment Authority, Signal Mountain STP is a publicly owned wastewater treatment works in Chattanooga, Hamilton County, Tennessee treating an average of 0.54 million gallons per day against a permitted design capacity of 0.4 MGD, serving about 8,411 residents. It discharges under NPDES permit TN0021211 (effective), which expires in March 2029, with 126 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in July 2024.

Treatment technology

One treatment structure or unit process identified at Hamilton County Wastewater Treatment Authority, Signal Mountain STP.

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Compliance snapshot (last 3 years)

Total violations
126
Effluent violations
124

Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.

EPA enforcement history

Federal civil enforcement cases, compliance inspections and informal actions recorded for Hamilton County Wastewater Treatment Authority, Signal Mountain STP in EPA's ICIS system.

Formal actions
1
0 since FY2020
Penalties assessed
$598,490
all cases
Compliance actions
$300M
required by EPA orders
EPA inspections
0
none on record

Latest case · Jul 2024

HAMILTON COUNTY WATER & WASTEWATER TREATMENT AUTHORITY (WWTA)

Judicial case · CWA, NPDES Discharge without a Permit · Final Order With Penalty · Penalty $598,490 · Compliance actions $300M

EPA's description of the case:

“JULY 15, 2024 - CONSENT DECREE This is a Clean Water Act enforcement case against a water and wastewater utility in Hamilton County, Tennessee (Hamilton County Water and Wastewater Authority, or…”

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Source: EPA ECHO, civil enforcement case 04-2015-9007.

Full case history with a free Klarifi account

Every action against Hamilton County Wastewater Treatment Authority, Signal Mountain STP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.

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Key contacts

Decision-makers at Hamilton County Wastewater Treatment Authority, Signal Mountain STP.

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Nearby wastewater treatment plants in Tennessee

50.56 MGD

Tdot I-24 Rest Area

Jasper · 13 mi away

0.0035 MGD

Jasper Lagoon

Jasper · 17 mi away

0.38 MGD

Dunlap STP

Dunlap · 18 mi away

0.5 MGD

Monteagle Stp, Plant #3

Monteagle · 30 mi away

0.23 MGD

8.48 MGD

Calhoun School

Calhoun · 37 mi away

0.0032 MGD

Cowan STP

Cowan · 38 mi away

0.07 MGD

Hamilton County Wastewater Treatment Authority, Signal Mountain STP: frequently asked questions

Sources and methodology

Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.

Data refreshed October 26, 2026; facility record last updated November 29, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms


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