Loudoun Pollution Sources

More Metadata This identifies pollution sources in the county that have been identified and assigned a unique SITE-ID number. The majority of pollution sources are individual sewage disposal (septic/drain field) systems. Note that all identified pollution sources are not necessarily causing pollution but, rather, can be simply a potential source of pollution. Information for pollution sources comes primarily from the Health Department permitting and inspection process and/or date of discovery from field verification. It is a sub-set of the water wells and pollution sources data.