- USGS webpage for Groundwater Quality
- Groundwater Quality and Groundwater Pollution (Fact Sheet, UCANR)
- Groundwater Ambient Monitoring and Assessment Program (State Water Board/USGS)
- Geotracker website (State Water Board)
Groundwater quality can be impacted by a host of natural and anthropogenic sources.
Additionally, contamination can occur from a single “point” source, like a decommissioned military base or by many distributed sites, commonly referred to as “non-point” source contamination, like nitrate contamination resulting from fertilizers used on many fields collectively.
Groundwater quality can vary between aquifers in the same basin, with shallow “unconfined” aquifers being particularly prone to contamination. Thus, groundwater monitoring is usually preformed in “nested” monitoring wells that enable sampling of individual aquifers separately.
Even within a single aquifer, groundwater quality can change with elevation. Groundwater quality generally degrades with increasing depth within an aquifer. Thus declining groundwater levels can lead to poorer water quality and concentration of contaminant.
Groundwater quality Mapping Tool
The GAMA groundwater information system from the State Water Board integrates and displays water quality data from various sources on an interactive map. The tool includes analytical tools and reporting features to help assess groundwater quality and identify potential groundwater issues.
Groundwater Quality Reports
Soon, the Groundwater Exchange will be fully integrated with the California Water Library so that reports will appear magically in this box. .
Soon, the Groundwater Exchange will be fully integrated with the California Water Library so documents will show up automatically. Through the wizardry of my tech team, other water quality reports not appearing in the box to the left will appear here; in the meantime, you can view all groundwater quality documents in the California Water Library by clicking here.