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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


Turbidity & Sedimentimentation

What is It?

-Turbidity is murky water created by stirring up sediment or having foreign particles suspended in the water.

Why is it in the environment?

-Sediments occur naturally in the water

-Soil runoff

How does it affect water quality?

-High turbidity reduces the amount of light penetrating the water, which reduces photosynthesis and the production of dissolved Oxygen.

-High turbidity also leads to an increase in water temperatures because the suspended particles absorb and trap heat.

-This, effect also reduces the concentration of dissolved Oxygen because warm water holds less oxygen.

How does it affect adults?

-Turbidity has no direct health effects.

How does it affect children?

-Turbidity has no direct health effects.

What are the EPA regulations?

-At no time can turbidity go above 5 nephelolometric turbidity units (NTU).

-Systems that filter must ensure that the turbidity go no higher than 1 NTU (0.5 NTU for conventional or direct filtration) in at least 95% of the daily samples in any month.

-As of January 1, 2002, turbidity may never exceed 1 NTU, and must not exceed 0.3 NTU in 95% of daily samples in any month.