National Point-Source Data

County-Level Point-Source Data for the United States


Point-source load estimates (mass/time) for 16 chemical constituents are from a Resources for the Future (RFF) national inventory of wastewater discharges from 32,000 facilities, including industries, municipal wastewater treatment plants, and small sanitary waste facilities for the years 1977-1981.

The inventory represents the most recent nationally comprehensive compilation of point-source discharges for the reported chemicals. The methods are described in detail in Giannesi and Peskin (1984) as referenced in the documentation file below. See also Giannesi, L.P. and Peskin, H.M., 1981, Water Resources Research, vol. 17 for additional discussion of these data.

Data Files

Documentation and data are available in the following files:

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Last modified: Tue Apr 21 11:00:13 EDT 1998