AQUIFER;
ARTICLE;
CHEMICAL ANALYSIS;
LAND USE;
RURAL AREA;
UNITED STATES;
URBAN AREA;
WATER ANALYSIS;
WATER CONTAMINATION;
WATER POLLUTANT;
WATER POLLUTION;
WATER QUALITY;
WATER SAMPLING;
DATA COLLECTION;
ENVIRONMENTAL MONITORING;
HUMANS;
NITRATES;
PESTICIDES;
REFERENCE VALUES;
SOIL POLLUTANTS;
UNITED STATES;
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY;
VOLATILIZATION;
WATER POLLUTANTS, CHEMICAL;
WATER SUPPLY;