Monticello WWTP
1105 E 1st Street, Monticello, IA 52310 · Jones County · Publicly Owned Treatment Works
- Average flow
- 0.5 MGD
- Design flow
- 1.6 MGD
- NPDES permit
- IA0026034
- Effective
- Permit expires
- December 2027
- Population served
- 3,770
- CWNS 2022
Monticello WWTP is a publicly owned wastewater treatment works in Monticello, Jones County, Iowa treating an average of 0.5 million gallons per day against a permitted design capacity of 1.6 MGD, serving about 3,770 residents. It discharges under NPDES permit IA0026034 (effective), which expires in December 2027, with 7 recorded violations in the last three years.
Treatment technology
4 treatment structures and unit processes identified at Monticello WWTP.
Available with a free Klarifi account
See the full treatment train at Monticello WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 7
- Effluent violations
- 7
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Industrial users and pretreatment
Industries that discharge process wastewater to Monticello WWTP, from the plant's pretreatment programme records.
- Industrial users
- 1
- on record
On record: Energy Mfg CO INC (Monticello). Most users are in automotive, metal and equipment manufacturing.
Unlock the details behind these industrial users
Discharge flow, federal category, source documents and contacts for every industrial user of Monticello WWTP. Free with a Klarifi account.
Key contacts
1 verified contact for Monticello WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Monticello WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Hopkinton · 8 mi away
0.05 MGD
Cascade · 9 mi away
0.19 MGD
Center Junction · 10 mi away
—
Worthington · 11 mi away
0.09 MGD
Anamosa · 11 mi away
0.79 MGD
Onslow · 13 mi away
—
Prairieburg · 14 mi away
—
Anamosa · 14 mi away
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Monticello 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 March 16, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms