Texas Environmental Almanac Map Section

Areas of Potential or Known Groundwater Pollution Resulting from Agricultural Activities

ORANGE	Counties with groundwater contamination from pesticides.
PINK	Counties with nitrate levels exceeding EPA recommended drinking water standard of 44 mg/L in more than 20 percent of samples. 1) More than 60 percent.
RED	Counties with arsenic concentrations exceeding the recommended EPA drinking water standard of 0.05 mg/L in more than 20 percent of samples. 1) more than 50 percent.

Source: Texas State Soil and Water Conservation Board, A Comprehensive Study of Texas Watersheds and Their Impact on Water Quality and Water Quantity (Temple: Texas State Soil and Conservation Board, January 1991), 131-137; and Texas Groundwater Protection Committee, Joint Groundwater Monitoring and Contamination Report, 1993 (Austin: TNRCC, 1994), Tables 2 and 5.

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