Water Resources of Pennsylvania
The geohydrology and water quality of a 1,664-foot-deep test hole in western Bradford County, Pennsylvania was characterized using rock core, geophysical logs, and water samples. The cooperative study with the Pennsylvania Geological Survey determined that the deepest active, fresh groundwater circulation was 700 to 900 feet below land surface at the upland location of the test hole. Highly saline water that flowed into the well at discrete fracture zones more than 900 feet deep had similar composition to Appalachian Basin brines that had been diluted with fresh water. Dissolved methane concentrations ranged from 7.8 to 37 milligrams per liter and isotope ratios of the methane indicated a thermogenic origin.
- 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
Baseline Streamflow Estimator (BaSE)
Estimate baseline streamflow for ungaged streams in Pennsylvania
Delineate watersheds and estimate streamflow
- NWIS Mapper
View the locations of sites with USGS water data
Compare current streamflow to historical record
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
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.
Streamflow, lake, reservoir, and precipitation data
Water levels in wells and other aquifer data
Chemical and biological quality data for surface water and groundwater
- Pennsylvania Storm-Tide Sensor Network Strengthened (Mon, 4 Aug 2014 9:00:00 EDT)
- Intersex Fish Now in Three Pennsylvania River Basins (Mon, 30 Jun 2014 7:00:00 EDT)
- Carbon Storage in U.S. Eastern Ecosystems Helps Counter Greenhouse Gas Emissions Contributing to Climate Change (Wed, 25 Jun 2014 16:33:54 EDT)
- Measuring Landscape Disturbance of Gas Exploration in Nine Pennsylvania counties (Tue, 10 Jun 2014 10:33:12 EDT)
- Coral Reefs are Critical for Risk Reduction & Adaptation (Tue, 13 May 2014 12:00:00 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
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 Flood—It's All About Chance," can be found at http://pubs.usgs.gov/gip/106/.