Water Column Toxicity of DDT Congeners to Hyalella Azteca Amphipods

Six DDT congeners were tested for toxicity on the freshwater amphipod Hyalella azteca over 7-day exposures. The dataset includes chemical and biological data from these tests, along with regression analyses calculating median and 20% effect concentrations for survival and biomass gain. This work was conducted by the U.S. Environmental Protection Agency and is associated with a 2025 publication in Environmental Toxicology and Chemistry.

Use Cases

• Modeling dose-response relationships for DDT congeners based on reported median and 20% effect concentrations.
• Assessing the comparative toxicity of p,p' and o,p' DDT forms based on the described chemical exposure data.
• Informing sediment quality guidelines using the water column toxicity results for Hyalella azteca mentioned in the description.
• Calibrating ecological risk assessment models with the survival and growth endpoint data from the 7-day tests.

Strengths

• Data is directly associated with a peer-reviewed publication in Environmental Toxicology and Chemistry (2025).
• Includes results from testing six specific DDT congeners on a standardized test organism.
• Contains calculated effect concentrations (e.g., median, 20%) for two biological endpoints: survival and biomass gain.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The primary data file format is PDF, which may complicate direct machine processing.

Provenance

Source

U.S. Environmental Protection Agency

Collection Method

Laboratory toxicity testing and subsequent regression analysis.

Time Range

The associated publication is from 2025; specific data collection dates are not provided.

Freshness

Last updated 2026-04-09 16:05:25.950997; freshness should be verified.

Geography

Laboratory study; geographic scope of implications is not specified.