The DEP, under cooperative agreement with
State, has maintained the Pennsylvania Atmospheric Deposition Monitoring
Network since 1981. The purpose of this program is to determine how much acid
rain is falling in Pennsylvania for environmental assessment purposes. Parameters
monitored include pH, sulfate, nitrate, ammonium, chloride, calcium, magnesium,
potassium, sodium, and specific conductance. Starting in 1997, measurements were
made of the amount of mercury in rain. The DEP currently supports 11 acid rain
and 8 mercury monitoring sites.
Acid rain has been in the headlines for a number of years.
It's effects on forests and soils, streams and lakes, fish and other organisms,
materials, and human health have been well documented. Title IV of the Clean Air
Act has successfully reduced two of the major pollutants that cause acid rain
that are emitted from large stationary sources. But more needs to done before
the environment can recover.
Rain Monitoring Sites and Data
See a map of acid
rain monitoring sites in Pennsylvania. Click on a site to get more information
including raw acid rain data in a text format.
Acid Rain Program
EPA's goal is to achieve significant
environmental and public health benefits through reductions in emissions of sulfur
dioxide and nitrogen oxides, the primary causes of acid rain.
The nation's primary source for data on dry acidic deposition
and rural, ground-level ozone. Operating since 1987, CASTNET is used in conjunction
with other national monitoring networks to provide information for evaluating
the effectiveness of national emission control strategies.
Alliance for Aquatic resource Monitoring
Mercury is emitted into the air primarily by large coal-fired power
plants. Mercury in the air is usually of little direct concern. But when mercury
is washed from the air by rain into our streams and lakes, it is transformed to
a highly toxic form that can build up in fish. People are then exposed to mercury
by eating fish.
- Fish Consumption
Mercury in the environment can accumulate
in fish. Refer to the advisory for more information on which fish are safe to