Pollutant Tracking and Accounting Project (PTAP)

The Pollutant Tracking and Accounting Project, or better known as PTAP, was created by NHDES and UNH to allow a consistent way for communities and other organizations within EPA Region 1 to track their nutrient reductions from both structural and non-structural BMPs. PTAP is funded by the Municipal Alliance for Adaptive Management and is available for all communities to use, including those authorized under both the NH MS4 Permit and Great Bay Total Nitrogen General Permit. 

NH MS4 permittees can use PTAP to track nutrient reductions from implemented structural and non-structural BMPs. Under the NH MS4 Permit, permittees that have phosphorus TMDLs, nitrogen impairments or phosphorus impairments are required to track their BMP nutrient reductions; PTAP enables them to fulfill this requirement. Please note that NH MS4 permittees are not required to use PTAP to track their nutrient reductions, they can track these metrics using any program/system they choose.