Sampling and Analysis of Drinking Water: Additional Information for Laboratories
- UPCOMING WEBINAR! Submit Lead and Copper Analyses through NEW Lab-To-State Portal June 20, 2017
- Submitting analytical data by Electronic Data Transfer (EDT), as require
- Alkalinity Conversions (PDF)
- PCBs: Guidance for Total PCBs Analysis (PDF) - September 1, 2006
- 1,4-Dioxane Method (PDF) - journal citation and CDPH contact information
- Interconverting Nitrate-N and Nitrate-NO3 (PDF) - April 15, 2011
- Radioactivity Analysis: Counting Errors (PDF) - December 1, 2006
- Borate/Carbonate/Bicarbonate Buffer for Sample Preservation for Hexavalent Chromium Analysis (PDF) - April 5, 2011
- Proposed Alternate Sample Preservation Buffer for Hexavalent Chromium (PDF) - May 18, 2010
- Detection Limits: Definitions (PDF)
- Detection Limits for Purposes of Reporting (DLRs) (Excel) define the analytical detection of a contaminant in terms of a level at which the Division of Drinking Water is confident about the quantification of the contaminant's presence in drinking water. Data are required to be submitted if detections are at or above the DLR.
- Related to DLRs, please see the following documents:
- DLR Conformance with D/DBP2 Minimum Reporting Levels (PDF) - August 1, 2006
- Quality Control (QC) Protocols for Synthetic Organic Chemical Analyses (PDF) - September 11, 2003 draft
- Protocol for Improving the QC for Drinking Water Quality Regulation Compliance Monitoring Samples (PDF) - October 30, 2002
More Information
EDT for Drinking Water Analyses
Environmental Laboratory Accreditation Program
Information for Public Drinking Water Systems
Division of Drinking Water
