CALIFORNIA58 RELOCATION GUIDE | October 26, 2026. Anyone considering a California home can research nearby permitted industrial facilities, contamination investigations and cleanup cases through public databases. The key is to distinguish an official site record from evidence of exposure at a particular property. A facility appearing on a map does not by itself establish a health danger, legal violation or contamination at an adjacent home.
Start with DTSC EnviroStor
The California Department of Toxic Substances Control operates EnviroStor, a searchable public system with investigation, permitting, cleanup and enforcement records. It can help residents find site names, map locations, the responsible agencies and publicly released documents. Review the record’s status, dates, monitoring results and land-use restrictions, instead of treating all listings as equal.
Check groundwater records in GeoTracker
The State Water Resources Control Board’s GeoTracker includes information on groundwater cleanup cases, some underground storage tanks, land disposal sites and environmental sampling. Its presence is particularly useful when groundwater concerns, historic fuel facilities or remediation are part of the property’s history.
Read the actual regulatory record
A map pin can represent an operating facility, a historical investigation, a site with a cleanup completed, or an open case under active oversight. Look at the agency correspondence and reports. Check whether the site is upstream or downwind only with appropriate technical evidence; a simple map distance is not a personalized exposure assessment.
Additional questions for buyers and renters
- Check the exact parcel address in both EnviroStor and GeoTracker.
- Examine zoning and planning records on current or proposed industrial uses.
- Ask whether recorded land-use restrictions apply to the subject property.
- Review required seller disclosures and contact the relevant regulator if a record is unclear.
- For concerns about a specific home’s water or indoor environment, consider a qualified independent professional and appropriate laboratory testing.
Local context is essential. Follow the city and county through California58 local newspapers for publicly documented land-use decisions, hearings and community notices.
Official reference: DTSC explanation of the California hazardous substances (Cortese) list. This guide describes research tools, not an allegation about any business or property.
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