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A Compilation of Water Quality Goals
This searchable database contains an extensive compendium of numerical water quality limits from the literature for over 860 chemical constituents and water quality parameters. Included are:
- California and Federal Drinking Water Standards (MCLs)
- California Public Health Goals (PHGs)
- California State Notification Levels for Drinking Water
- Health Advisories, Water Quality Advisories, and Drinking Water Advisories
- Suggested No-Adverse-Response Levels (SNARLs)
- Cancer Risk Estimates
- Health-based criteria from USEPA's Integrated Risk Information System (IRIS)
- Proposition 65 Safe Harbor Levels
- California Toxics Rule Criteria to Protect Human Health and Aquatic Life
- California Ocean Plan Water Quality Objectives
- USEPA Recommended Criteria to Protect Human Health and Aquatic Life
- Agricultural Use Protective Limits
- Taste and Odor Based Criteria
These limits may be used to assess whether beneficial uses of surface water or groundwater are likely to be impaired or threatened.
The information in the Water Quality Goals database is current as of April 6, 2010.
Water Quality Goals Online Database - Search
Explanatory Staff Report
Also available is a staff report that explains, with examples, how the limits in the Water Quality Goals database may be used to derive assessment thresholds based on California's water quality standards. A summary of relevant statutes, regulations, plans, and policies and a list of references are included. The staff report is currently under revision. The text from the August 2007 Edition is still available.
Data Downloads
The data from the Water Quality Goals database is available in three downloadable file formats for download.
- Tab Delimited Text format (txt) - For import into database or spreadsheet programs
- Water Quality Limit Tables)
- Footnotes
- References)
- Data Dictionary - A key to field names used in the database tables.
Updates
- Changes made to the Water Quality Goals database during the following intervals:
Receive updates by email regarding changes to the Water Quality Goals database and staff report. Subscribe online to the “Water Quality Goals” email list.
Petroleum Limits
A summary of water quality limits for petroleum fuel mixtures, constituents and additives for the protection of waters designated as municipal and domestic water supply in the Basin Plan.
Questions or Comments about Water Quality Goals?
- Please email Jon Marshack or phone (916) 341-5514.