USGS

Effects of septic-tank effluent on ground-water quality in northern Williamson County and southern Davidson County, Tennessee

U.S. Geological Survey, Water Resources Investigations Report 91-4011

by Dorothea Withington Hanchar


Table of Contents

Abstract

Introduction

Purpose and scope

Acknowledgments

Septic-tank systems

Geohydrology of the study area

Well construction

Data collection and analysis

Effects of septic-tank effluent on ground-water quality

Major inorganic constituents

Nutrients

Organic substances

Optical brighteners

Bacteria

Summary and conclusions

References cited

 


 

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