1 / 6

Numeric Nutrient Criteria: Methods for Developing Inland Criteria

This document outlines the methods for developing numeric nutrient criteria for inland waters, as detailed by Jacques L. Oliver of the U.S. EPA's Office of Water. It highlights the significant nutrient-related impairments across the nation, indicating that 20% of reported impairments and 18% of Total Maximum Daily Loads (TMDLs) are attributed to nutrient issues. Lists of nutrient-related impairments and TMDLs for various states are provided, revealing that states like Alaska and Hawaii have the highest numbers. This critical data underscores the ongoing challenge of nutrient pollution affecting water quality nationwide.

sanne
Download Presentation

Numeric Nutrient Criteria: Methods for Developing Inland Criteria

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Numeric Nutrient Criteria:Methods for Developing Inland Criteria Jacques L. Oliver U.S. EPA Office of Water, Office of Science and Technology Health and Ecological Criteria Division Washington, D.C.

  2. National Nutrient-related listing and TMDL Results • Of 75,677 impairments nationwide, 15,101 (20%) are “nutrient-related” (defined as ‘nutrients, organic enrichment/oxygen depletion, noxious plants, algal growth, and ammonia’). • Of 40,698 TMDLs nationwide, 7,412 (18%) are “nutrient-related” • Based on the most recent 303(d) list data available in ATTAINS as of January 27, 2010 -- http://www.epa.gov/waters/tmdl/expert_query.html

  3. States’ 303(d) Listed Water Quality ‘Nutrient-related’ Impairments AK HI VI Greater than 800 303(d) listings for nutrients (5) CNMI >200 and <800 listings due to nutrients (16) >100 and <200 listings due to nutrients (6) PR AS GU Less than 100 listings due to nutrients (29) Based on information in Expert Query (ATTAINS) as of 10/23/2009. Of 75,675 impairments nationwide, 15,101 (20%) are due to nutrient-related defined as ‘nutrients, organic enrichment/oxygen depletion, noxious plants, algal growth, and ammonia’. This data is based on the most recent 303(d) list data available in ATTAINS.

  4. ‘Nutrient-related’ TMDLs AK HI VI Greater than 800 TMDLs for nutrients (0) CNMI >200 and <800 TMDLs for nutrients (12) >100 and <200 TMDLs for nutrients (9) PR AS GU Less than 100 TMDLs for nutrients (32) Based on information in Expert Query (ATTAINS) as of 01/14/2010. 7,261 TMDLs were nutrient-related. Nutrient-related is defined as ‘nutrients, organic enrichment/oxygen depletion, noxious plants, algal growth, and ammonia’.

  5. Questions?

More Related