Garrett WWTP
Garrett, IN · De Kalb County · Publicly Owned Treatment Works
- Average flow
- 0.48 MGD
- Design flow
- 1.2 MGD
- NPDES permit
- IN0022969
- Effective
- Permit expires
- October 2026
- Population served
- 6,499
- CWNS 2022
Garrett WWTP is a publicly owned wastewater treatment works in Garrett, De Kalb County, Indiana treating an average of 0.48 million gallons per day against a permitted design capacity of 1.2 MGD, serving about 6,499 residents. Treatment on site includes clarifiers. It discharges under NPDES permit IN0022969 (effective), which expires in October 2026, with 66 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
Unlock
Unlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 66
- Effluent violations
- 41
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Garrett WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Garrett WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Indiana
Avilla · 5 mi away
0.22 MGD
Laotto · 6 mi away
0.04 MGD
Corunna · 7 mi away
0.01 MGD
Kendallville · 10 mi away
1.29 MGD
St. Joe · 12 mi away
0.05 MGD
Churubusco · 12 mi away
0.34 MGD
Ashley · 14 mi away
0.13 MGD
Butler · 15 mi away
0.94 MGD
Garrett 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 September 11, 2026; facility record last updated May 18, 2025.