Garrett WWTP
1112 S Harrison St, Garrett, IN 46738 · De Kalb County · Publicly Owned Treatment Works
- Average flow
- 0.75 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 0.75 million gallons per day against a permitted design capacity of 1.2 MGD, serving about 6,499 residents. It discharges under NPDES permit IN0022969 (effective), which expires in October 2026, with 67 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Garrett WWTP.
Available with a free Klarifi account
See the full treatment train at Garrett WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 67
- Effluent violations
- 42
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Garrett WWTP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
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
0.3 MGD
Laotto · 6 mi away
0.14 MGD
Corunna · 7 mi away
—
Kendallville · 10 mi away
6.42 MGD
St. Joe · 12 mi away
0.05 MGD
Churubusco · 12 mi away
0.23 MGD
Ashley · 14 mi away
0.16 MGD
Butler · 15 mi away
2.12 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 October 26, 2026; facility record last updated May 18, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms