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Data Access Overview

Graphing Water Quality Data

    Directions for Graphing Water      Quality

     Samples of Water Quality Graphs

     EPA STORET Data

Pollutant and Water Quality     Information
     Ammonia
     Arsenic
     Benzene
     Dissolved Oxygen
     Fecal Coliform
     Lead
     Mercury
     Methyl-t-butyl Ether
     Nitrates
     pH
     Phosphorus
     Sulfate
     Turbidity & Sedimentation



Water Testing

    ph
     Nitrogen
     Fecal Coliform
     Dissolved Oxygen
     Company Websites


pH

What is It?

-pH (potential Hydroden), is defined as the negative log-base 10 of the hydrogen ion concentration: pH = - log10 [H+]

How does it affect water quality?

-The pH scale measures how acidic or basic a substance is.

-It ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic, and a pH greater than 7 is basic.

-Each whole pH value below 7 is ten times more acidic than the next higher value.

-A pH of 5 is ten times more acidic than a pH of 6 and 100 times (10 times 10) more acidic than a pH of 7.

How does it affect adults?

-A lowering of pH may corrode distribution pipes in potable water plants, releasing heavy metals into the water.

-An increase in pH may cause heightened ammonia concentrations & also release metals into the water.

How does it affect children?

-Same

What are the EPA regulations?

-pH 6.5-8.5