Environmental Issues > Water Main Page > All Water Documents

Most beach closings and advisories are issued because beachwater monitoring has detected bacteria that indicate the presence of pathogens -- microscopic organisms from human and animal wastes that pose a threat to human health. The key known contributors of these contaminants are stormwater runoff, untreated or partially treated discharges from sewage treatment systems, discharges from sanitary sewers and septic systems, and wildlife.

last revised 6/26/2012

Sign up for NRDC's online newsletter

See the latest issue >

Water on Switchboard

NRDC experts write about water efficiency, green infrastructure and climate on the NRDC blog.


Recent Water Posts

How Pollution and Climate Change Threaten Our Beaches
posted by Ben Chou, 6/26/13
"Testing the Waters" for Bacteria That Can Make You Sick
posted by Becky Hammer, 6/26/13
NRDC Report: Cleaning Up America's Beaches Requires Leadership on Polluted Runoff
posted by Jon Devine, 6/26/13
Give the Gift That Will Make a Difference: A Long Cool Drink

NRDC Gets Top Ratings from the Charity Watchdogs

Charity Navigator awards NRDC its 4-star top rating.
Worth magazine named NRDC one of America's 100 best charities.
NRDC meets the highest standards of the Wise Giving Alliance of the Better Business Bureau.


Donate now >

Share | |
Find NRDC on
YouTube