Northwood City Of STP
1410 10th St. South, Northwood, IA 50459 · Worth County · Publicly Owned Treatment Works
- Average flow
- 0.21 MGD
- Design flow
- 1.49 MGD
- NPDES permit
- IA0032395
- Effective
- Permit expires
- September 2029
- Population served
- 2,072
- CWNS 2022
Northwood City Of STP is a publicly owned wastewater treatment works in Northwood, Worth County, Iowa treating an average of 0.21 million gallons per day against a permitted design capacity of 1.49 MGD, serving about 2,072 residents. It discharges under NPDES permit IA0032395 (effective), which expires in September 2029, with 1 recorded violation in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in March 2018.
Treatment technology
4 treatment structures and unit processes identified at Northwood City Of STP.
Available with a free Klarifi account
See the full treatment train at Northwood City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Northwood City Of STP in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Compliance actions
- $6M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Mar 2018
NORTHWOOD, IOWA
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty · Compliance actions $6M
Source: EPA ECHO, civil enforcement case 07-2014-0035.
Full case history with a free Klarifi account
Every action against Northwood City Of STP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Industrial users and pretreatment
Industries that discharge process wastewater to Northwood City Of STP, from the plant's pretreatment programme records.
- Industrial users
- 1
- on record
On record: Ada Enterprises INC (Northwood). Most users are in chemicals, plastics and petroleum.
Unlock the details behind these industrial users
Discharge flow, federal category, source documents and contacts for every industrial user of Northwood City Of STP. Free with a Klarifi account.
Key contacts
1 verified contact for Northwood 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 Northwood City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Kensett · 6 mi away
—
Grafton · 10 mi away
—
Manly · 10 mi away
0.27 MGD
Joice · 12 mi away
—
Plymouth · 14 mi away
0.12 MGD
Fertile · 15 mi away
—
St. Ansgar · 15 mi away
0.1 MGD
Lake Mills · 16 mi away
0.28 MGD
Northwood 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 February 3, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biosolids · Filter press · all terms