Flat Rock Stp, Village Of
South Pine Street, Flat Rock, IL 62427 · Crawford County · Publicly Owned Treatment Works
- Average flow
- 0.03 MGD
- Design flow
- 0.26 MGD
- NPDES permit
- ILG580224
- Effective
- Permit expires
- May 2027
- Population served
- 501
- CWNS 2022
Flat Rock Stp, Village Of is a publicly owned wastewater treatment works in Flat Rock, Crawford County, Illinois treating an average of 0.03 million gallons per day against a permitted design capacity of 0.26 MGD, serving about 501 residents. It discharges under NPDES permit ILG580224 (effective), which expires in May 2027, with 5 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Flat Rock Stp, Village Of.
Available with a free Klarifi account
See the full treatment train at Flat Rock Stp, Village Of: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 5
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Flat Rock Stp, Village Of, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Flat Rock Stp, Village Of, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Palestine · 8 mi away
0.08 MGD
Robinson · 8 mi away
1.57 MGD
Bridgeport · 14 mi away
0.2 MGD
Oblong · 14 mi away
0.1 MGD
Hutsonville · 15 mi away
0.07 MGD
Hutsonville · 15 mi away
—
Sumner · 16 mi away
0.07 MGD
Sainte Marie · 19 mi away
0.05 MGD
Flat Rock Stp, Village Of: 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 October 7, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biosolids · Filter press · all terms