Search Results for the EPA National Library Catalog

Items Found: 1567

Showing: Items 1501 - 1550

Your Search: (SUBJECT=Nitrates.)

 
 
 

PREV 1 ... 21 22 23 24 25 26 27 28 29 30 31 32 NEXT
Select Item Title Year Published
Water Resources Data for Ohio, Water Year 1971. Part II. Water Quality Records. 1972
Water Resources Data for Ohio, Water Year 1972. Part II. Water Quality Records. 1973
Water Resources Data for Ohio, Water Year 1975. Volume 1. Ohio River Basin. 1975
Water Resources Data for Ohio, Water Year 1975. Volume 2. St. Lawrence River Basin. 1975
Water Resources Data for Ohio, Water Year 1977. Volume 1. Ohio River Basin. 1978
Water Resources Data for Ohio, Water Year 1977. Volume 2. St. Lawrence River Basin. 1978
Water Resources Data for Ohio, Water Year 1978. Volume 1. Ohio River Basin. 1979
Water Resources Data for Ohio, Water Year 1978. Volume 2. St. Lawrence River Basin. 1979
Water Resources Data for Oklahoma, Water Year 1971. Part 2. Water Quality Records. 1972
Water Resources Data for Oklahoma, Water Year 1972. Part 2. Water Quality Records. 1973
Water Resources Data for Oklahoma, Water Year 1973. Part 2. Water Quality Records. 1974
Water Resources Data for Oklahoma, Water Year 1974. Part 2. Water Quality Records. 1975
Water Resources Data for Oregon, Water Year 1977. 1978
Water Resources Data for Pennsylvania Water Year 1975. Volume 1. Delaware River Basin. 1976
Water Resources Data for Pennsylvania, Water Year 1973. Part 2. Water Quality Records. 1974
Water Resources Data for Pennsylvania, Water Year 1974. Part 2. Water Quality Records. 1975
Water Resources Data for South Carolina, Water Year 1971. Part 1. Surface Water Records. Part 2. Water Quality Records. Part 3. Ground Water Records. 1972
Water Resources Data for South Carolina, Water Year 1972. Part 1. Surface Water Records. Part 2. Water Quality Records. Part 3. Ground Water Records. 1973
Water Resources Data for South Carolina, Water Year 1973. Part 1. Surface Water Records. Part 2. Water Quality Records. Part 3. Ground Water Records. 1974
Water Resources Data for South Carolina, Water Year 1974. Part 1. Surface Water Records. Part 2. Water Quality Records. Part 3. Ground Water Records. 1975
Water Resources Data for South Dakota, Water Year 1973. Part 2. Water Quality Records. 1974
Water Resources Data for Virginia, Water Year 1971. Part 1. Surface Water Records. Part 2. Water Quality Records. Part 3. Ground Water Records. 1972
Water Resources Data for Virginia, Water Year 1974. Part 1. Surface Water Records. Part 2. Water Quality Records. Part 3. Ground Water Records. 1975
Water Resources Data for Virginia, Water Year 1977. 1978
Water Resources Data for Washington, Water Year 1976. Volume 1. Western Washington. 1977
Water Resources Data for Washington, Water year 1976. Volume 2. Eastern Washington. 1977
Water Resources Data for Washington, Water Year 1977. Volume I. Western Washington. 1978
Water Resources Data for Washington, Water Year 1977. Volume II. Eastern Washington. 1978
Water Resources Data for Wisconsin, Water Year 1971. Part 1. Surface Water Records. Part 2. Water Quality Records. 1972
Water Resources Data for Wisconsin, Water Year 1972. Part 1. Surface Water Records. Part 2. Water Quality Records. 1973
Water Resources Data for Wisconsin, Water Year 1973. Part 1. Surface Water Records. Part 2. Water Quality Records. 1974
Water Resources Data for Wyoming, Water Year 1976. Volume 1. Missouri River Basin. 1977
Water Resources Data for Wyoming, Water Year 1976. Volume 2. Green River, Bear River, and Snake River Basins. 1978
Water Resources Potential of an Urban Estuary. (Saugus River, Pines River and Lynn Harbor Complex). 1970
Water Treatment Plant Processes and Operations. 1974
Water-quality assessment of the Delmarva Peninsula, Delaware, Maryland, and Virginia : results of investigations, 1987-91 / 1999
Water-quality assessment of the Ozark Plateaus study unit, Arkansas, Kansas, Missouri, and Oklahoma : nutrients, bacteria, organic carbon, and suspended sediment in surface water, 1993-95 / 1998
Waterbury Reservoir Washington and Lamoille Counties Vermont. 1974
Waterford Inpoundment-Tichigan Lake, Racine County, Wisconsin. 1974
Watershed Analysis Relating to Eutrophication of Lake Michigan. 1971
Watershed manipulation project : field implementation plan for 1990-1992 / 1993
Waterville Lake, Haywood County, North Carolina. 1975
Webster Lake, Kosciusko County, Indiana. 1976
Weiser-Lower Payette water quality surveys ... August 1975 and December 1975 1976
West Okoboji Lake, Dickinson County, Iowa. 1976
West Valley Reprocessing Plant. Proposed Change in Technical Specifications for Operating License CSF-1. 1971
Western Lake Survey, Phase I : analytical methods manual / 1987
Westler Lake, Lagrange County, Indiana. 1976
What controls phytoplankton production in nutrient-rich areas of the open sea? / 1991
White Bear Lake, Ramsey and Washington Counties, Minnesota. 1974
PREV 1 ... 21 22 23 24 25 26 27 28 29 30 31 32 NEXT

Save, Print or Email Selected Records