Newton City Of STP
1915 East 5th Street South, Newton, IA 50208 · Jasper County · Publicly Owned Treatment Works
- Average flow
- 2.43 MGD
- Design flow
- 13.1 MGD
- NPDES permit
- IA0027723
- Effective
- Permit expires
- April 2031
- Population served
- 16,283
- CWNS 2022
Newton City Of STP is a publicly owned wastewater treatment works in Newton, Jasper County, Iowa treating an average of 2.43 million gallons per day against a permitted design capacity of 13.1 MGD, serving about 16,283 residents. It discharges under NPDES permit IA0027723 (effective), which expires in April 2031, with 3 recorded violations in the last three years.
Treatment technology
3 treatment structures and unit processes identified at Newton City Of STP.
Available with a free Klarifi account
See the full treatment train at Newton City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 3
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Newton City Of STP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Newton City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Reasnor · 8 mi away
—
Kellogg · 8 mi away
—
Colfax · 10 mi away
0.5 MGD
Baxter · 10 mi away
0.21 MGD
Prairie City · 11 mi away
0.32 MGD
Monroe · 12 mi away
0.27 MGD
Mingo · 13 mi away
—
Grinnell · 16 mi away
1.35 MGD
Newton City Of 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 6, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms