Annville Twp STP
US Rte 422 W, Annville, PA 17003 · Lebanon County · Publicly Owned Treatment Works
- Average flow
- 0.62 MGD
- Design flow
- 0.8 MGD
- NPDES permit
- PA0021806
- Effective
- Permit expires
- May 2027
- Population served
- —
- CWNS 2022
Annville Twp STP is a publicly owned wastewater treatment works in Annville, Lebanon County, Pennsylvania treating an average of 0.62 million gallons per day against a permitted design capacity of 0.8 MGD. It discharges under NPDES permit PA0021806 (effective), which expires in May 2027, with 4 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Annville Twp STP.
Available with a free Klarifi account
See the full treatment train at Annville Twp STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 4
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Annville Twp STP.
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Nearby wastewater treatment plants in Pennsylvania
Campbelltown · 3 mi away
0.15 MGD
Lebanon · 4 mi away
5.34 MGD
Campbelltown · 5 mi away
0.11 MGD
Jonestown · 6 mi away
0.23 MGD
Grantville · 6 mi away
0.18 MGD
Colebrook · 6 mi away
0.02 MGD
Mount Gretna · 7 mi away
0.07 MGD
Lawn · 8 mi away
0.0096 MGD
Annville Twp 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 12, 2026; facility record last updated September 16, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Sludge dewatering · Biological nutrient removal · all terms