Published By U.S. Geological Survey, Department of the Interior
Issued over 9 years ago
US
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Summary
Description
Septic systems are useful for removing and processing human waste. However, they have the potential of leaking or discharging waste into the nearby system and increasing potential contamination of nearby streams. Data represent potential locations of septic sewers in the Pacific Northwest based on extrapolation of 1990 Census tract block group level information.