Name: Septic System Density (2010)
Display Field: SEPTDEN
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: 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.
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.
Service Item Id: 6c33f10dc55f4f12a3f8dcf747bad2f0
Copyright Text: Montana State Library, U.S. Census Bureau
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YMin: 5521044.2255000025
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Spatial Reference: 102100
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LatestVCSWkid(0)
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Field 1: SEPTDEN
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Value: C
Label: Municipal System
Description: N/A
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Value: H
Label: High
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Value: L
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OBJECTID
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type: esriFieldTypeOID, alias: OBJECTID
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Shape
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SEPTDEN
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