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Ecoregional Criteria
Ecoregion V: South Central Cultivated Great Plains
This document presents EPA's nutrient criteria for Nutrient Ecoregion V. These criteria provide EPA's recommendations to States and authorized Tribes for use in establishing their water quality standards consistent with section 303(c) of the Clean Water Act (CWA). Under section 303(c) of the CWA, States and authorized Tribes have the primary responsibility for adopting water quality standards as part of State or Tribal law or regulation.
The ecoregion is defined as: South Central Cultivated Great Plains, including all or parts of the states of Montana, North Dakota, South Dakota, Nebraska, Wyoming, Colorado, Kansas, Oklahoma, Texas, and New Mexico, and the authorized Tribes within the ecoregion.
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- Ecoregional Criteria Document for Lakes & Reservoirs (PDF) (EPA 822-B-01-010; 2.7MB)
- Ecoregional Criteria Document for Rivers & Streams (PDF) (EPA 822-B-01-014; 2.7MB)
- From the Nutrients Database: Aggregate Ecoregional Nutrient Criteria