What is the address of Knoxville STP?

The address on the plant’s EPA facility record is 507 South Division Street, Knoxville, IL 61448, in Knox County. Its coordinates are 40.9025, -90.2900. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Knoxville STP treat?

Knoxville STP is permitted for a design flow of 1.65 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does Knoxville STP use?

Klarifi has identified one treatment structure or unit process at the Knoxville facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Knoxville STP?

The facility discharges under NPDES permit IL0022209, currently effective, expiring September 2030.

Is Knoxville STP in compliance?

Discharge monitoring reports show 2 violations at Knoxville STP in the last three years, 2 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Knoxville STP and how do I contact them?

Knoxville STP is a publicly owned treatment works in Knoxville, Illinois. Klarifi lists decision-maker contacts for this facility, available with a free trial.

Try for free Log in

Knoxville STP

507 South Division Street, Knoxville, IL 61448 · Knox County · Publicly Owned Treatment Works

Average flow: —

Design flow: 1.65 MGD

NPDES permit: IL0022209; Effective

Permit expires: September 2030

Population served: 3,837; CWNS 2022

Knoxville STP is a publicly owned wastewater treatment works in Knoxville, Knox County, Illinois, serving about 3,837 residents. It discharges under NPDES permit IL0022209 (effective), which expires in September 2030, with 2 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Knoxville STP.

Available with a free Klarifi account

See the full treatment train at Knoxville STP: structures, unit processes and planned upgrades, with exact unit counts.

Create a free account

Compliance snapshot (last 3 years)

Total violations: 2

Effluent violations: 2

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

Key contacts

Decision-makers at Knoxville STP.

No verified contacts on file yet

Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.

Try Klarifi free

Nearby wastewater treatment plants in Illinois

Galesburg Sanitary District STP

Galesburg · 7 mi away

7.4 MGD

Wataga South Stp, Village Of

Wataga · 8 mi away

0.005 MGD

Spoon Valley Lake STP

Dahinda · 9 mi away

0.05 MGD

Wataga - Stp, Village Of

Wataga · 9 mi away

0.05 MGD

Abingdon Stp, City Of

Abingdon · 10 mi away

0.6 MGD

Maquon Stw, Village Of

Maquon · 10 mi away

0.02 MGD

Oneida Sanitary District South - STP

Oneida · 12 mi away

0.1 MGD

Oneida Sanitary District - North STP

Oneida · 13 mi away

0.09 MGD

Knoxville 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 March 28, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms

Try Klarifi for free

Create your own trial account and explore how Klarifi can help you.

Try for free