New Issues


Litterfall Mercury Monitoring Initiative


The National Atmospheric Deposition Program (NADP) has a new litterfall mercury monitoring initiative to complement the Mercury Deposition Network (MDN) monitoring for mercury in precipitation and the Atmospheric Mercury Network (AMNet) monitoring for mercury in air

Fukushima Dai-ichi radioactive fallout detected in NADP samples


The National Atmospheric Deposition Program and the United States Geological Survey collaborated to monitor NADP precipitation samples for the presence of radioactive material in response to the Japan Fukushima Dai-ichi Nuclear Power Station incident that occurred on March 11, 2011.

Ammonia Monitoring Network, a new NADP Network


The Ammonia Monitoring Network is the NADP's newest network. The AMoN reports atmospheric ammonia concentrations to determine ammonia dry deposition.

Atmospheric Mercury Network (AMNet)


The AMNet reports atmospheric mercury concentrations for determination of mercury dry deposition.

Equipment Modernization


NADP is modernizing its equipment.

Special Projects


National Mercury Monitoring Network.