Groundwater impact assessment will screen likely nitrate contamination from septic systems; pathogens omitted because of data gaps

Apr 29, 2025

Sacramento State's Office of Water Programs presented a three-part methodology to screen where on-site wastewater systems may be contributing nitrates to groundwater statewide and to prioritize further investigation; presenters said pathogen screening was not possible given available data.

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Sacramento State's Office of Water Programs (OWP) described a methodological framework developed for the Wastewater Needs Assessment to screen where on-site wastewater treatment systems (OTS) may be contributing nitrate contamination to groundwater and to prioritize areas for further investigation or potential remediation.

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