Click the link to read the article on the Circle of Blue website (Brett Walton):
The Rundown
- EPA finalizes new water quality standards for a 38-mile urbanized section of the Delaware River.
- EPA internal watchdog will begin assessments of wildfire and inland flood risk to Superfund sites.
- USGS studies long-term trends for pesticide concentrations in groundwater, finding them declining.
- GAO recommends that the Department of Energy hasten its reviews of historical PFAS use at its sites.
- Defense Department delays PFAS cleanup at some of its contaminated sites.
And lastly, a federal judge allows a lawsuit against the EPA over the Flint water crisis to continue.
“The EPA failed to keep children and families safe during the water crisis. It is outrageous that a decade has passed without the EPA admitting its mistake and paying the citizens of Flint what they are owed. The EPA administrator should settle this lawsuit right now.” – Rep. Kristen McDonald Rivet (D-MI), in a statement about a lawsuit against the EPA for its role in the Flint water crisis. A federal district judge denied the EPA’s petition to dismiss the lawsuit, which was brought by city residents and alleges that the agency was negligent in its duties under the Safe Drinking Water Act.
By the Numbers
57: Department of Energy sites that are slated for an assessment of historical PFAS use. According to the Government Accountability Office, only 20 of the sites have completed an initial review. Twenty-one sites have a review in progress, and 16 have not started. More than 100 other DOE sites are not being reviewed.
News Briefs
PFAS Cleanup Delay
The Defense Department is delaying PFAS cleanup at some of its contaminated sites, the New York Times reports. New timelines are in place for about 140 sites, the Times found when comparing a Trump administration update to a Biden-era plan.Delaware River
To protect two endangered fish species, the EPA strengthened water quality standards for a 38-mile urbanized section of the Delaware River.The standards, which originated during the Biden administration and seek to increase dissolved oxygen levels, apply to parts of the river between Philadelphia and Wilmington, Delaware. Two species of endangered sturgeon live in these waters.
The standards will result in lower polluted discharges from industrial and municipal sewage and stormwater systems.
Studies and Reports
Pesticides in Groundwater
A U.S. Geological Survey analysis found long-term declines in pesticide concentrations in groundwater in the nation’s major aquifer systems.Across three decades of groundwater testing, the researchers found decreasing levels of most pesticides. That includes atrazine, one of the most broadly used chemicals. Twenty-one pesticides were analyzed.
Why the declines? Several factors are at play: less pesticide use, chemical degradation of pesticides in soils, and variable rainfall patterns and soil management, which can influence movement of pesticides after they are sprayed.
Some pesticides leave enduring legacies. DBCP, which was banned for agricultural use in the U.S. in 1979, was still the only pesticide in the study that exceeded human health standards in groundwater. (Though sampling for it took place only in California.)
The declines “can be viewed as encouraging results,” the authors write.
But they also urge caution: “many negative human-health effects have been linked to pesticide exposure, and these negative effects can occur when pesticide concentrations are below the human health benchmarks used in this study.”
The study results come from sampling 59 regional well networks and comparing pesticide concentrations to health standards. These networks represent agricultural and urban land uses, as well as areas in which groundwater is a drinking water source.
On the Radar
Superfund Environmental Risks
The EPA’s internal watchdog will begin two investigations into environmental risks for Superfund sites.One assessment will look at risks from inland flooding and whether remediation plans take into account potential flood disruptions. The other will do the same analysis but for wildfire risk.
Texas Desalination
The Army Corps of Engineers issued permits for a proposed 100-million gallon per day desalination facility near Corpus Christi, Texas.Federal Water Tap is a weekly digest spotting trends in U.S. government water policy. To get more water news, follow Circle of Blue on Twitter and sign up for our newsletter.