Wastewater Treatment Facilities statistics

[Covers treatment facilities, which are structures designed to treat wastewater, storm water, or combined sewer overflows prior to discharging to the environment. Treatment is accomplished by subjecting the wastewater to a combination of physical, chemical, and/or biological processes that reduce the concentration of contaminants]

				Number of
	Number of facilities			facilities		1996			199 latest available
					-			-

Level of				Please	Present	Number of persons		Present	Number of persons
treatment	1988	1992	1996	supply	design	served		design	served
				latest	capacity			capacity
				available	(mgd ¹)	Total	Percent	(mgd)	Total	Percent
							of U.S.			of U.S.

Total.................................................................	15,591	15,613	16,024	________	42,225	189,710,899	71.8	________	________	________

Non-discharge ²...........................................	1,854	1,981	2,032	________	1,421	7,660,876	2.9	________	________	________
Less than secondary.......................................	1,789	868	176	________	3,054	17,177,492	6.5	________	________	________
Secondary..................................................	8,536	9,086	9,388	________	17,734	81,944,349	31.0	________	________	________
Greater than secondary.....................................	3,412	3,678	4,428	________	20,016	82,928,182	31.4	________	________	________

1 Millions of gallons per day.
2 Facilities that do not discharge effluent to surface waters.

Source: U.S. Environmental Protection Agency, Office of Wastewater Management, 1996 Clean Water Needs Survey Report to Congress.

http://www.epa.gov/owmitnet/uc.htm

* The Environmental Protection Agency's Clean Water Needs Survey (CWNS) is required by Sections 205(a) and 516(b)(1) of the Clean Water Act (CWA). The CWNS is a summary of the estimated capital costs for water quality projects and other activities eligible for SRF support as authorized by the 1987 CWA Amendments. These activities include both facilities and certain water quality program elements. Activities include the planning, design, and construction of publicly owned wastewater collection and treatment systems and projects controlling CSOs, SW, and NPS pollutants. Other eligible water quality program elements are those that involve one-time expenditures supporting the CWA goals, such as program development and implementation. Ongoing expenditures, such as operation and maintenance (O&M) costs, are not included. The 1996 CWNS, a joint effort of the States and EPA, is the twelfth such survey since the CWA was enacted in 1972. * Primary Treatment

The first stage of wastewater treatment, including removal of floating debris and solids by screening and sedimentation.

Wastewater

Dissolved or suspended waterborne waste material. Sanitary or domestic wastewater refers to liquid material collected from residences, offices, and institutions. Industrial wastewater refers to wastewater from manufacturing facilities. Municipal wastewater is a general term applied to any liquid treated in a municipal treatment facility and usually includes a mixture of sanitary and pretreated industrial wastes.

Wastewater Infrastructure

The pipes and appurtenances for the collection, treatment, and disposal of sewage in a community. The level of treatment will depend on the size of the community, the type of discharge, and/or the designated use of the receiving water.

*

http://www.allcountries.org/uscensus/391_wastewater_treatment_facilities.html

These tables are based on figures supplied by the United States Census Bureau, U.S. Department of Commerce and are subject to revision by the Census Bureau.

Copyright © 2006 Photius Coutsoukis and Information Technology Associates, all rights reserved.