Pennsylvania Water Science Center



DATA CENTER

USGS Waterwatch:
Maps of Current Conditions


Pennsylvania Streamstats

Delineate watersheds and estimate streamflow



National Water Information System (NWIS)

View current and historical streamflow, groundwater level, and water-quality data for Pennsylvania

Real-time data

Historical data

 

USGS IN YOUR STATE

USGS Water Science Centers are located in each state.

There is a USGS Water Science Center office in each State. Washington Oregon California Idaho Nevada Montana Wyoming Utah Colorado Arizona New Mexico North Dakota South Dakota Nebraska Kansas Oklahoma Texas Minnesota Iowa Missouri Arkansas Louisiana Wisconsin Illinois Mississippi Michigan Indiana Ohio Kentucky Tennessee Alabama Pennsylvania West Virginia Georgia Florida Caribbean Alaska Hawaii New York Vermont New Hampshire Maine Massachusettes South Carolina North Carolina Rhode Island Virginia Connecticut New Jersey Maryland-Delaware-D.C.

Water Resources of Pennsylvania

Highlighted Publications
Science Feature

streamstatsArsenic in Groundwater Wells

Analytical results for arsenic in water samples from 5,023 wells obtained during 1969–2007 across Pennsylvania were compiled and related to other associated groundwater-quality and environmental factors and used to predict the probability of elevated arsenic concentrations, defined as greater than or equal to 4.0 micrograms per liter (µg/L), in groundwater. Arsenic concentrations of 4.0 µg/L or greater (elevated concentrations) were detected in 18 percent of samples across Pennsylvania; 8 percent of samples had concentrations that equaled or exceeded the U.S. Environmental Protection Agency's drinking-water maximum contaminant level of 10.0 µg/L. The highest arsenic concentration was 490.0 µg/L.

Press Release | Report (SIR 2012-5257)

The Pennsylvania Baseline Streamflow Estimator (BaSE)

BaSE

  • Estimate baseline streamflow (minimally altered by regulation, diversion, or mining, and other anthropogenic activities) for ungaged streams in Pennsylvania
  • Generate text file of daily mean streamflow for the ungaged site for the period 1960 to 2008
  • Create a report that includes streamflow data, exceedance probabilities, basin characteristics, and hydrographs for the ungaged site

Find out more

Hydrologic Toolbox
The USGS Pennsylvania Water Science Center is your direct link to all kinds of water-resource information. Data collection and interpretive studies are done in cooperation with various local, State, and Federal agencies.
Hydrologic Monitoring Networks

Surface waterSurface Water

Streamflow, lake, reservoir, and precipitation data

Groundwater Groundwater

Water levels in wells and other aquifer data

Water quality Water Quality

Chemical and biological quality data for surface water and groundwater

Of Interest...

alert iconOn-demand, current conditions for water data directly to your mobile phone or email. 2 ways to get started:

  1. Send a text message to WaterNow@usgs.gov containing the USGS Site Number of the gage you want to query
  2. Send an email message to WaterNow@usgs.gov where either the Subject or the first line of the message contains the USGS Site Number of the gage you want to query

Visit WaterNow for more details

Just What Is a 100-Year Flood Anyway?

USGS flood poster

Almost everyone has heard the term "100-year flood", but not everyone knows what it really means. A common question is, "we just had a 100-year flood a few years ago, why are we having another one so soon?" The USGS Office of Surface Water has released a poster that explains the concept, probabilistic nature, and inherent uncertainties of a 100-year flood. The poster, entitled "100-Year Flood—It's All About Chance," can be found at http://pubs.usgs.gov/gip/106/.

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