Hillsboro WWTP
9883 Highway Bb, Hillsboro, MO 63050 · Jefferson County · Publicly Owned Treatment Works
- Average flow
- 0.22 MGD
- Design flow
- —
- NPDES permit
- MO0085383
- Effective
- Permit expires
- December 2028
- Population served
- 3,200
- CWNS 2022
Hillsboro WWTP is a publicly owned wastewater treatment works in Hillsboro, Jefferson County, Missouri treating an average of 0.22 million gallons per day, serving about 3,200 residents. It discharges under NPDES permit MO0085383 (effective), which expires in December 2028, with 58 recorded violations in the last three years.
Treatment technology
5 treatment structures and unit processes identified at Hillsboro WWTP.
Available with a free Klarifi account
See the full treatment train at Hillsboro WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 58
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Hillsboro WWTP.
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.
Nearby wastewater treatment plants in Missouri
Hillsboro · 1 mi away
0.36 MGD
Hillsboro · 2 mi away
0.09 MGD
Hillsboro · 4 mi away
0.03 MGD
Hillsboro · 4 mi away
0.0087 MGD
Hillsboro · 5 mi away
0.01 MGD
Hillsboro · 5 mi away
0.0037 MGD
Cedar Hill · 6 mi away
0.01 MGD
Cedar Hill · 6 mi away
0.0093 MGD
Hillsboro WWTP: 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 September 4, 2024.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms