North Liberty WWTP
North Liberty, IA 52317 · Johnson County · Publicly Owned Treatment Works
- Average flow
- 2.03 MGD
- Design flow
- 10.05 MGD
- NPDES permit
- IA0032905
- Effective
- Permit expires
- April 2031
- Population served
- 14,223
- CWNS 2022
North Liberty WWTP is a publicly owned wastewater treatment works in North Liberty, Johnson County, Iowa treating an average of 2.03 million gallons per day against a permitted design capacity of 10.05 MGD, serving about 14,223 residents. It discharges under NPDES permit IA0032905 (effective), which expires in April 2031, with 0 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at North Liberty WWTP.
Available with a free Klarifi account
See the full treatment train at North Liberty WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in North Liberty
North Liberty's capital improvement plan lists 29 water, sewer and wastewater line items worth $10M starting 2025–2029. The largest budgeted items are shown here.
All water and sewer capital projects in North Liberty →
| Project | Budget | Years |
|---|---|---|
| Gravity Sanitary Sewer | $2,370,000 | 2026–2027 |
| Water Tower #3 | $1,600,000 | 2026–2027 |
| Water Treatment Facility Addition | $1,320,000 | 2026–2027 |
| Membrane Train Cassettes | $1,100,000 | 2025–2030 |
| Cedar Springs Lift Station | $450,000 | 2026–2027 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
1 verified contact for North Liberty WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at North Liberty WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Coralville · 3 mi away
2.98 MGD
Tiffin · 4 mi away
0.52 MGD
Solon · 8 mi away
0.49 MGD
Iowa City · 9 mi away
8.98 MGD
Swisher · 9 mi away
0.12 MGD
Ely · 10 mi away
0.17 MGD
Oxford · 10 mi away
0.12 MGD
Hills · 13 mi away
0.16 MGD
North Liberty 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 14, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · FOG · Equalization tank · all terms