These are some of the stories we’ve been following this week.

The Conasauga River. By U.S. Fish and Wildlife Service Southeast Region. CC BY 2.0 or Public domain, via Wikimedia Commons.

• New research shows that stormwater retention ponds may not be keeping road salt out of surface waters.

• Centre, Alabama, filed a lawsuit against 35 carpet manufacturers in Georgia, accusing them of contaminating a water source used by the city.

• Seven years after the Deepwater Horizon oil spill, researchers are back in the Gulf of Mexico studying the continued effects of the spill.

• An oil pipeline in Michigan reportedly violated easements detailing how the length the pipeline could stretch between supports.

• Home prices in the United Kingdom hit lows not seen in eight years, thanks to Brexit and recent tax hikes.

• Farm runoff is believed to be the cause of algae blooms in the Shenandoah River, according to a recent lawsuit filed by environmentalists against the Environmental Protection Agency (EPA).

• A new bill signed into law in Virginia aims to dispose of coal ash in the most environmentally way possible.

• Property values in Palm Beach County are on their way up, thanks to increased construction in the Florida county.

• As debate on the EB-5 Immigrant Investor Program continues, developers and investors should be preparing for possible changes to the program.