Saturday, Nov 28th

Last update08:06:22 AM GMT

You are here News Environment American urban lake pollution traced to parking lot seal coat

American urban lake pollution traced to parking lot seal coat

E-mail Print PDF

Lake pollutionA black sealant sprayed on parking lots, driveways and playgrounds turns out to be the largest contributor to the rise of a toxic pollutant in urban lakes and reservoirs across America, according to a new U.S. Geological Survey study.

Scientists saw concentrations of polycyclic aromatic hydrocarbons (PAHs) going up rapidly in the 1990s in areas of urban sprawl. PAHs have been known as a probable human carcinogen since the 19th century, when cancer struck chimney sweeps, said Peter Van Metre, a USGS scientist and a principal author of the report. PAHs also are toxic to fish and other aquatic plant and animal life.

The research was based on sampling of sediments from the bottom of 40 lakes and reservoirs in commercial and residential areas in cities and suburbs typical of where most Americans live — not near old industrial sites. Among the cities tested were Anchorage, Alaska; Fort Worth, Texas; Portland, Ore.; Seattle; Orlando, Fla.; Raleigh, N.C., Chicago, Newark, N.J., Detroit; Milwaukee and Boston.

What was striking about the findings was that lakes that had high levels of PAHs also had a large fraction of those PAHs coming from coal-tar-based sealants. The opposite also was true — lakes that had low PAH levels also had a very low fraction of them from the sealant.


Most Recent Related Stories...

Fracking Companies Have Been Getting Worse About Disclosing The Chemicals They Use

Fracking chemicals not disclosedWant to know what chemicals energy companies use in their hydraulic fracking operations? Turns out it’s...

First EPA chief accuses Republicans of ignoring science for political gain

Willlliam RuckelshausThe man considered the father figure of environmental protection in the US has attacked Republicans for...

2015 set to be hottest year on record, WMO says

hottest year on reconrd - 2015This year is shaping up to be the hottest on record, and 2016 could be even...

Prince Charles: Climate Change Root Cause of Syrian War

Syrian draughtEngland’s Prince Charles told Sky News in an exclusive interview that climate change was a root...
America's # 1 Enemy
Tee Shirt
& Help Support!
TVNL Tee Shirt
Conserve our Planet
& Help Support!
Get your 9/11 & Media
Deception Dollars
& Help Support!
The Loaded Deck
The First & the Best!
The Media & Bush Admin Exposed!