Water Quality and Septic Systems in Indiana
Are septic systems treating the waste adequately?
Potential contaminants from septic systems
Contaminants in septic systems: Pathogens
Contaminants in septic systems: Pathogens
Contaminants in septic systems: Pathogens
Contaminants in septic systems: Pathogens
Fate of contaminants in septic systems: Phosphorus
Contaminants in septic systems: Nitrogen
The new ground water standard for nitrate
ISDH proposed rule to meet ground water standards
"What spacing is needed to..."
Assumptions about the effluent: Volume (Ve) and Ne
Assumptions about ground water recharge (Vr and Nr)
Area needed to keep long-term nitrate concentrations below 10 mg/l
How many
“septic non-systems”?
Housing survey can help define septic system needs
Many soils are not suitable for conventional systems
Severe limitations by
county
% of area with “severe limitations” according to NRCS criteria.
Soil suitability - Online maps using “Internet Map Server”