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What to Do After a WET Test Failure: Understanding TRE Requirements in California
A Whole Effluent Toxicity (WET) test failure can be one of the most stressful compliance issues for facilities operating under an NPDES permit in California.
4 days ago4 min read
Top Causes of Chronic Toxicity Failures in California Wastewater
Chronic toxicity failures during Whole Effluent Toxicity (WET) testing are a common compliance challenge for facilities operating under NPDES permits in California.
Jun 214 min read
Staying in Compliance with NPDES Permits in California: Understanding Bioassay Testing
Facilities that discharge wastewater in California operate under some of the most rigorous environmental regulations in the United States. The NPDES program requires permit holders to demonstrate that their discharge does not harm receiving waters.
May 284 min read
How to Diagnose Chronic Toxicity: A Step-by-Step TIE/TRE Workflow
Diagnosing the cause of chronic toxicity in wastewater can be one of the most challenging aspects of maintaining NPDES compliance in California. When a Whole Effluent Toxicity (WET) test fails, the next step is not just retesting, it is understanding why toxicity is occurring.
Apr 274 min read
Matching contaminant classes to the most sensitive California NPDES chronic WET species - freshwater and marine
Matching contaminant classes to the most sensitive California NPDES chronic WET species - freshwater and marine
Feb 75 min read
Staying Ahead of Compliance: What’s New in California NPDES Bioassay Testing in 2025
Staying Ahead of Compliance: What’s New in California NPDES Bioassay Testing in 2025
Dec 12, 20253 min read
The Importance of Using Standardized Microbiological Methods to Monitor Water Quality in California
The Importance of Using Standardized Microbiological Methods to Monitor Water Quality in California
Oct 31, 20254 min read
Bioassay Testing in California:
Bioassay Testing in California: Safeguarding Our Environment Through Science
Aug 22, 20252 min read
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