USGS: Science Topics: water pH

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Water pH

The negative logarithm of the hydrogen ion concentration or activity of a water solution. Used for expressing both acidity (pH less than 7) and alkalinity (pH greater than 7), with 7 considered neutral.

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Results 1 - 10 of 10 listed by similarity [list alphabetically]

Groundwater quality of southeastern Wyoming [More info]: Explains how we assess groundwater quality here, what characteristics are important, and how they hurt or, in some cases, help use use the water.
Water science for schools: common water measurements [More info]: Explanation of common water properties including temperature, pH, specific conductance, turbidity, dissolved oxygen, hardness and suspended sediment for students and general public.
Water science for schools: water properties [More info]: Educational site for elementary school students on the properties of water with links to a true/false quiz, common water measurements, pH, and water facts.
WaterQualityWatch -Continuous Real-Time Water Quality of Surface Water in the United States [More info]: Maps and explanations of continuous real-time data collection methods and results, including water temperature, turbididty, specific conductance, dissolved oxygen, pH, and stream discharge values.
Acid Rain in Shenandoah National Park, Virginia [More info]: Explains acidity and acid rain and how it affects aquatic organisms. Describes the effect of acid rain on this national park, identifying areas that are at greater or lesser risk from acid rain.
Acid rain effects on Adirondack streams - results from the 2003-05 western Adirondack stream survey (the WASS Project) [More info]: Acidified soils caused toxic aluminum in 66 percent of 565 assessed streams. Diatoms and aquatic macroinvertebrates were moderately to severely affected. These effects have not improved in areas surveyed in the early 1980s
Response of Florida shelf ecosystems to climate change: from macro to micro scales [More info]: Study of the effects of ocean acidification on regional carbonate processes, changes in individual estuaries, and organism-level response.
Science-Based Strategies for Sustaining Coral Ecosystems [More info]: Explains the environmental factors that affect coral reef habitats and ecosystems, focusing on those that pose urgent problems.
Studying ocean acidification in the Arctic Ocean [More info]: New synoptic data from samples collected in the Arctic Ocean and insights into the patterns and extent of ocean acidification. This foundational geochemical information will help us to understand potential risks to Arctic resources.
Understanding Contaminants Associated with Mineral Deposits [More info]: Outlines processes that control the release of metals and acidic waters from inactive mines and mineralized areas, the transport of metals and acidic waters to streams, and the fate and effect of metals and acidity on downstream ecosystems.

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