Water Resources of Pennsylvania
OFR 2013-1052:
Total Nutrient and Sediment Loads, Trends, Yields, and Nontidal Water-Quality Indicators for Selected Nontidal Stations, Chesapeake Bay Watershed, 1985-2011
SIR 2012-5250:
Total Nitrogen and Suspended-Sediment Loads and Identification of Suspended-Sediment Sources in the Laurel Hill Creek Watershed, Somerset County, Pennsylvania, Water Years 2010–11
SIR 2013-5085:
Baseline groundwater quality from 20 domestic wells in Sullivan County, Pennsylvania, 2012
SIR 2013-5045:
Investigations of groundwater system and simulation of regional groundwater flow for North Penn Area 7 Superfund site, Montgomery County, Pennsylvania
DOI: 10.1002/hyp.9885:
Surface-water and groundwater interactions in an extensively mined watershed, upper Schuylkill River, Pennsylvania, USA
OFR 2013-1061:
Groundwater-Level Trends and Forecasts, and Salinity Trends, in the Azraq, Dead Sea, Hammad, Jordan Side Valleys, Yarmouk, and Zarqa Groundwater Basins, Jordan
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Arsenic 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)
- 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
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Baseline Streamflow Estimator (BaSE)
Estimate baseline streamflow for ungaged streams in Pennsylvania -
StreamStats
Delineate watersheds and estimate streamflow - NWIS Mapper
View the locations of sites with USGS water data - WaterWatch
Compare current streamflow to historical record - WaterQualityWatch
View stream-temperature and water-quality monitoring data - Groundwater Watch
Compare current groundwater levels to historical record - Groundwater Recharge
Compare aquifer recharge for 197 watersheds - WaterAlert
Get condition updates by text message or email
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.
Surface Water
Streamflow, lake, reservoir, and precipitation data
Groundwater
Water levels in wells and other aquifer data
Water Quality
Chemical and biological quality data for surface water and groundwater
Newsroom
- Nearly 3,900 New Maps in Time for Summer (Tue, 30 Jul 2013 11:00:00 EDT)
- Measuring Landscape Disturbance of Gas Exploration in Somerset and Westmoreland Counties (Wed, 19 Jun 2013 9:00:00 EDT)
- Determining Rivers Vulnerable to Asian Carp Spawning in the Great Lakes Basin (Tue, 18 Jun 2013 11:00:00 EDT)
- Naturally Occurring Methane Found in Some Sullivan County Water (Tue, 18 Jun 2013 9:30:00 EDT)
- Measuring Landscape Disturbance of Gas Exploration in Fayette and Lycoming Counties (Mon, 3 Jun 2013 15:41:55 EDT)
On-demand, current conditions for water data directly to your mobile phone or email. 2 ways to get started:
- Send a text message to WaterNow@usgs.gov containing the USGS Site Number of the gage you want to query
- 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?
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 FloodIt's All About Chance," can be found at pubs.usgs.gov/gip/106/.