National Weather Service
Northern Water Weather and Field ET data

Government and University
CDPHE Environmental Ag Program
Colorado USDA – Natural Resources Conservation Service (NRCS)
United States Environmental Protection Agency (EPA)
CSU Extension
KSU Extension
University of Nebraska Extension
Utah AFO and CAFO Regulations (R317-8-10)

Testing Laboratories
Getting accurate test results is crucial to making sound decisions about how to properly manage resources. Some laboratories participate in the North American Proficiency Testing (NAPT) program, which is a voluntary program created and managed by the Soil Science Society of America. The NAPT program “assists soil, plant and water testing laboratories in their performance through inter-laboratory sample exchanges and a statistical evaluation of the analytical data.”

The Colorado Natural Resources Conservation Service (NRCS) requires that all NRCS cooperators (ie. agricultural producers receiving cost-share) use testing laboratories that participate in the NAPT Program. For example, agricultural producers who receive funding to have a Nutrient Management Plan developed must test field soils, water and waste materials (as applicable) as part of the NMP development process.  Thus, once collected, the samples must be analyzed by a lab participating in the NAPT program, or a State-recognized program that considers laboratory performance and proficiency to assure accuracy of soil test results.  Information regarding the NAPT Program is available at   Source: Colorado NRCS Agronomy Technical Note (Revised), April 23, 2006.

Ag Testing Laboratories 
Midwest Labs
Olsen’s Ag Lab
Servitech Laboratories
Ward Labs
Western Labs
Stukenholz Laboratory

Soil Testing
What Soil Tests Really Tell You (AgWeb article)

Colorado Stream Flow Data
Division of Water Resources Stream Flow data

Climate Prediction Center
National Weather Service monthly and annual forecast maps and Data