Agriculture and natural sources are the major sources of impairment for lakes. Most wetlands are on private lands. Agriculture, hydromodifications in watersheds, and natural processes are the sources of impairment. Ground Water Quality - Not reported in a quantifiable format or unknown. Ground Water Quality monitoring network is composed of 242 different types of wells and conducts the primary ambient ground water monitoring in the state.
Nitrate contamination is a major concern.
The major sources of these contaminants included active industrial facilities, spills, leaking storage tanks, mineral extraction, and agricultural activities. Programs to Restore Water Quality A Local Environmental Protection Program provides financial assistance to 98 of the state's 105 counties to develop and implement a comprehensive plan for protection of the local environment. The Point Source Pollution Program regulates wastewater treatment systems of municipal, federal, industrial, and commercial sewage facilities, stormwater, and larger livestock operations. Smaller livestock facilities and other sources of pollutants are addressed by the Non Point Source Control Program. Directed funds, mainly to upgrade large wastewater treatment facilities serving cities, have resulted in documented water quality improvements at several locations.