| 01-28 | Stormwater | NPDES Individual Stormwater Permit Annual Inspection Report |
| 01-28 | Stormwater | NPDES PAG-03 Semiannual Discharge Monitoring Report (DMR): for July-December period |
| 01-28 | Wastewater | NPDES PAG-03 Semiannual DMR: for July-December period |
| 01-30 | Air | Compliance Certification: statement of compliance with TVOP conditions (due 1/30 or permit anniv. date) |
| 01-30 | Air | Deviation Report: semiannual report of monitoring, deviations, and corrective actions |
| 01-30 | Air | NESHAP SSM: semiannual report of SSM events, some may be eliminated |
| 01-30 | Air | NSPS: semiannual report of misc. operating data depending on source type (landfill, boiler, etc.) |
| 01-31 | Wastewater | DRBC Annual Effluent Monitoring Report (AEMR) |
| 02-04 | Tanks | Southeast Region: Annual Tank Registration Fee for PADEP regulated storage tanks |
| 02-19 | Residual Waste | USEPA Annual Report: required if facility design flow rate =one million gallons per day, serves =10,000 people, or is required to have an approved pretreatment program (Class I Sludge Management Facility) |
| 03-01 | Air | Annual Air Emission Inventory (AIMS) Report: for operating and emissions data |
| 03-01 | EPCRA | Tier II for Emergency Planning and Community Right-to-Know Act (EPCRA): report of chemical inventory, quantities, and locations for prior year |
| 03-01 | Residual Waste | 26R Chemical Analysis: analysis of waste (due 3/1 or anniversary of disposal) |
| 03-01 | Residual Waste | Biennial Report: generators of >13 tons of residual waste |
| 03-01 | Residual Waste | Biosolids Annual Operating Report: for facilities covered by a beneficial use PAG-O7 or PAG-08 permit |
| 03-23 | Stormwater | Annual Report (PAG-03) for prior year |
| 03-23 | Stormwater | NPDES Annual NOI fee (PAG-03): or for new permittees, due the first instance of March 23 following one full year of coverage |
| 03-31 | Air | Annual USEPA Green House Gas (GHG) Emissions Report |
| 03-31 | IPP | Submitted by municipalities with USEPA-mandated MIPP |
| 03-31 | Wastewater | Chapter 94 Municipal Wasteload Management Report & General CSO Permit Annual Report |
| 03-31 | Water | Chapter 110 - Public Water Suppliers: for prior year; DRBC Annual Water Audit |
| 04-01 | Water | Consumer Confidence Report (CCR): to all purchasing systems |
| 04-04 | Tanks | Northeast Region: Annual Tank Registration Fee for PADEP regulated storage tanks |
| 06-04 | Tanks | Southcentral Region: Annual Tank Registration Fee for PADEP regulated storage tanks |
| 06-30 | Water | Chapter 110 - Non-Public Water Suppliers: Annual Well Water Withdrawal Report |
| 07-01 | EPCRA | TRI/Form R: annual report of air, water and waste inputs and outputs, larger facilities |
| 07-01 | Water | Certification for Public Notification of Service Line Material Identification |
| 07-01 | Water | Consumer Confidence Report (CCR): mail or directly deliver to every customer |
| 07-28 | Stormwater | NPDES PAG-03 Semiannual DMR: for January-June period |
| 07-28 | Wastewater | NPDES PAG-03 Semiannual DMR: for January-June period |
| 08-04 | Tanks | Northcentral Region: Annual Tank Registration Fee for PADEP regulated storage tanks |
| 09-01 | Air | Annual Title V Emission Fee Calculation and Payment |
| 09-01 | Hazardous Waste | Re-notification of Small Quantity Generator Status |
| 09-30 | Air | Deviation Report: semiannual report of monitoring, deviations, and corrective actions |
| 09-30 | Stormwater | MS4 Annual Report |
| 10-01 | Water | Consumer Confidence Report (CCR) Certification: to PADEP |
| 10-04 | Tanks | Southwest Region: Annual Tank Registration Fee for PADEP regulated storage tanks |
| 12-07 | Stormwater | General NPDES Permit (Chapter 102) Annual Report (construction) |
| 12-04 | Tanks | Northwest Region: Annual Tank Registration Fee for PADEP regulated storage tanks |
| 12-31 | Air | Annual Operating Permit Maintenance Fee: all air permits |
| Quarterly | Water | PFAS Sampling for all water systems |
| Annual | Water | Service Line Inventory Updates |
| Annual | Stormwater | Review/update Stormwater Pollution Plan (SWPPP or PPC) and perform employee training |
| Annual | Air | Title V Permittee Annual Compliance Report: due 30 days after Effective Date of Permit (EDP) |
| Annual | Wastewater | NPDES Individual Permit Fee: due on anniversary of EDP |
| Annual | IPP | Mandated IPP Control Authority: inspection and sampling of SIUs |
| Every 5 years | Residual Waste | 25R - Source Reduction Strategy: update every 5 years, submission not required, keep on file |
| Every 5 years | Industrial | Spill Prevention Control and Countermeasure (SPCC) Plan: update and perform employee training |
| Every 5 years | Air | Air Quality Permit Renewal Application: due 180 days prior to exp. |
| Every 5 years | Wastewater | DRBC Docket Renewal: due 6 months prior to exp. |
| Every 5 years | Wastewater | Individual NPDES Permit Renewal: due 180 days prior to exp. |