Air Facilities

For a MassDEP air facility demonstrably attributable to the named organisation, the public layer reports annual tons for PM10, PM2.5, SO2, lead, VOC, ammonia, CO, NOx, and total hazardous air pollutants, together with MAX_REP_YR as the most recent reporting year. This directly supplies regulator-published facility emissions history with pollutant, quantity unit, and temporal pin; HAP totals are subject to the documented caveat that HAP reporting is not required for every facility.

MassDEP's standing public statewide layer is expressly limited to open air facilities subject to Source Registration and/or greenhouse-gas reporting; its metadata says major facilities have operating permits while minor facilities remain subject to reporting. FAC_ID and FAC_NAME identify the facility, GHG_REPORT, NESHAPS, and NSPS report regulated-programme applicability, and CLASS, CLASS_DESC, and MAJ_MIN report fee/source class and major/minor operating-permit category. Use this link only when FAC_NAME demonstrably resolves to the named organisation, retain the layer vintage and search date, and do not interpret the layer as supplying a permit number, permit term, or affirmative compliant/noncompliant finding.