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Nutrient News

ASLO - Aquatic Sciences Meeting

Granada, Spain
February 22-27, 2015

Misissippi River/Gulf of Mexico Hypoxia Task Force Fall Meeting

Columbus, OH
May 2015

Society for Freshwater Science 2015 Annual Meeting

Milwaukee, WI
May 17-21, 2015

NALMS - 35th International Symposium

Saratoga Springs, NY
November 17-20, 2015

August 2014 Lake Erie Algal Bloom

NASA Landsat Image from August 3, 2014 Read more. . .

Satellite image of Lake Erie showing an algal bloom along the coast east and north of Toledo

November 2014 Environmental Health Perspectives article on Nutrient Pollution.

Read the article. . . Read more. . .

Title page of the Nutrient Pollution article and a map showing states with numeric criteria for Total Nitrogen or Total Phosphorus

Recent Articles on Nutrients in Lakes from Dr. Lester Yuan, USEPA OST

- L.L. Yuan, A.I. Pollard. 2014. Classifying Lakes to Quantify Relationships Between Epilimnetic Chlorophyll a and Hypoxia. Environmental Management. December.
- L.L. Yuan, A.I. Pollard. 2014. Classifying Lakes to Improve Precision of Nutrient-Chlorophyll Relationships. Freshwater Science. April.

algal bloom in a lake

Dr. Lester Yuan, USEPA OST, co-authored three chapters in the 2014 book Ecological Causal AssessmentRead more. . .

algal bloom in a pond

USEPA OST Article on Microcystin:

L.L. Yuan, A.I. Pollard, S. Pather, J.L. Oliver, L. D’Anglada. 2014. Managing microcystin: identifying national-scale thresholds for total nitrogen and chlorophyll a. Freshwater Biology. 59(9):1970–1981. Read more. . .

NOAA image of microcystis bloom in Lake Ontario

Highlighted Resources and Links

duration and frequencyUpdated EPA fact sheet - Preventing Eutrophication: Scientific Support for Dual Nutrient Criteria (February 2015). Click here.

2015 National Numeric Nutrient Criteria Webinar Series presentations are available. Click here.

Recent EPA contributions to peer-reviewed literature on nutrient-related topics. Click here.

Find out more about harmful algal blooms. Click here.

Searchable bibliography of nutrient sources from 1951 to 2014.
duration and frequency Click here.

Presentations from the 2014 Regional Numeric Nutrient Criteria Technical Workshops are available. Click here.

Nutrient Criteria Contacts and Links

Click on the map below to select an EPA region or select your state or territory from the dropdown menu.

USEPA Region 9, Commonwealth of the Northern Mariana Islands USEPA Region 9, Trust Territories USEPA Region 9, American Samoa USEPA Region 9, Guam USEPA Region 9, Hawaii USEPA Region 9 USEPA Region 10, Alaska USEPA Region 10 USEPA Region 8 USEPA Region 5 USEPA Region 7 USEPA Region 6 USEPA Region 4 USEPA Region 2, Virgin Islands USEPA Region 2, Puerto Rico USEPA Region 3 USEPA Region 2 USEPA Region 1

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Nutrient Criteria
Approach Toolbox

A toolbox for practitioners tasked with the goal of developing numeric nutrient criteria. The toolbox will continue to expand as technical advances are made by EPA and its state partners in developing numeric nutrient criteria.

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Nutrient News >

Updates about nutrient issues near you! Includes upcoming nutrient events, nutrient news articles, and other information about nutrients.

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Nutrient Criteria
Information Library

Repository for a variety of support materials, such as: webcasts and presentations by national nutrient experts, handy links, Federal nutrient documents, and a searchable bibliography of nutrient criteria topics!

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Nutrient Criteria
Contacts and Links

Contacts and links organized by EPA region and states accessed via an interactive map.

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Ask the Experts >

Forum for posting and reading responses on technical questions relating to nutrients and nutrient criteria. Use the Technical REQuest System (T-REQS) to log in and post new comments to the expert panel.

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Glossary >

Useful terms and acronyms defined for the nutrient criteria community.