GEOGRAPHIC INFORMATION

Estimated Relative Septic System Density, Montana, 1990

Data Provider Montana State Library
Date 04/01/1990
Content Type Offline Data
Abstract These data are a re-classification of the population density of Census Blocks into estimated septic system densities of H, M, or L (High, Medium, or Low).Areas within incorporated cities and towns are reclassified as "C", which means that the area is assumed to have a municipal waste disposal system rather than individual septic systems.High density is defined as being areas with over 750 persons per square mile. Medium density is defined as being areas with 125 to 750 persons per square mile. Low density is defined as being areas with less than 125 persons per square mile.
Purpose The Federal Safe Water Drinking Act requires states to implement Source Water Assessment Programs that analyze existing and potential threats to the quality of the states' public water supplies. The Montana Source Water Protection Program (SWPP) has complied with this by publishing source water delineation and assessment reports for each public water supply. A required element of each assessment is an estimate of the septic system density in the source region. The State Library developed these data under the guidance of the SWPP and published it in the State Library Digital Atlas application so that SWPP personell and the public could view a map of the septic system density around any public water supply.
Supplemental Information
These data are for general planning purposes only. Census Block boundaries are arbitrary -- large Census Blocks may contain small areas of concentrated population and high septic system density that are not shown here. This data set is provided "as-is" without warranty of any kind. The DEQ makes no representations or warranties whatsoever with respect to the accuracy or completeness of this data set and assumes no responsibility for the suitability of this data set for a particular purpose; and DEQ will not be liable for any damages incurred as a result of errors in this data set. The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time.
Distributor Montana State Library
PO Box 201800
Helena, MT 59620-1800
Telephone: 406-444-5354
TDD/TTY: Montana Relay 711
Fax: 406-444-0266
Email: geoinfo@mt.gov
Distribution liability These data are for general planning purposes only. Census Block boundaries are arbitrary -- large Census Blocks may contain small areas of concentrated population and high septic system density that are not shown here. This data set is provided "as-is" without warranty of any kind. The DEQ makes no representations or warranties whatsoever with respect to the accuracy or completeness of this data set and assumes no responsibility for the suitability of this data set for a particular purpose; and DEQ will not be liable for any damages incurred as a result of errors in this data set. The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time.
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Metadata date 08/24/2015