26 Arch Street, Williamsport, PA 17701 · Lycoming County · Publicly Owned Treatment Works
Williamsport Sanitary Authority - West Plant is a publicly owned wastewater treatment plant in Williamsport, Lycoming County, Pennsylvania treating an average of 1.85 million gallons per day against a permitted design capacity of 3.92 MGD. It discharges under NPDES permit PA0027049 (effective), which expires in February 2029, with 0 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in February 2016.
2 treatment structures and unit processes identified at Williamsport Sanitary Authority - West Plant.
Available with a free Klarifi account
See the full treatment train at Williamsport Sanitary Authority - West Plant: structures, unit processes and planned upgrades, with exact unit counts.
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Federal civil enforcement cases, compliance inspections and informal actions recorded for Williamsport Sanitary Authority - West Plant in EPA's ICIS system.
Latest case · Feb 2016
WILLIAMSPORT SANITATION AUTHORITY
Judicial case · CWA, NPDES Permit Violations · Final Order With Penalty · Penalty $320,000 · Compliance actions $19M
Source: EPA ECHO, civil enforcement case 03-2007-0341.
Full case history with a free Klarifi account
Every action against Williamsport Sanitary Authority - West Plant with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
3 verified contacts for Williamsport Sanitary Authority - West Plant, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Williamsport Sanitary Authority - West Plant, plus the full compliance history and discharge data.
Williamsport · 3 mi away
5.18 MGD
Montoursville · 9 mi away
0.51 MGD
Jersey Shore · 15 mi away
0.99 MGD
New Columbia · 16 mi away
0.26 MGD
Milton · 18 mi away
1.61 MGD
Loganton · 20 mi away
0.02 MGD
Mifflinburg · 21 mi away
0.65 MGD
Milton · 21 mi away
0.02 MGD
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 March 3, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms