Toxic Substances Hydrology Program

The current state of knowledge on the modes of action, production, fate, and occurrence of the freshwater cyanobacterial neurotoxins, anatoxin-a and saxitoxin, was reviewed and synthesized to identify gaps and critical research needs to better...

A conceptual model, based on contaminant properties and ecotoxicological principles, was developed to understand the transfer of contaminants from aquatic to terrestrial ecosystems and the effects of various classes of contaminants on terrestrial...

Study Shows Water Quality Minimally Affected by Artificial Recharge

A joint collaboration between EPA, NOAA, NASA, and USGS scientists has demonstrated that satellite imagery can be used to track the frequency of harmful algal blooms.  The satellites can accomplish this by measuring certain algal pigments in the water.

A new U.S. Geological Survey study that looked at the extensive harmful algal bloom that plagued Florida last year found far more types of cyanobacteria present than previously known.

Uranium levels in Pigeon Spring, just north of the Grand Canyon, are likely due to a natural source of uranium and not related to the nearby former Pigeon Mine, according to a recent study by the U.S. Geological Survey.

Studies on the aquatic food web, tree swallows, and the spread of contaminants take center stage at SETAC 2016.

When you’re not dead yet, but aren’t feeling well either, there’s an EarthWord for that...

First-of-its-kind survey shows that algal toxins are found nationwide

At least one pharmaceutical chemical was detected in all 59 streams sampled

These are the first published studies to demonstrate water-quality impacts to a surface stream due to activities at an unconventional oil and gas wastewater deep well injection disposal site.