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National Lakes Assessment Project (NLAP)

Minnesota’s participation in the U.S. Environmental Protection Agency’s (USEPA) 2012 NLA involved a collaborative approach that included USEPA, U.S. Forest Service (USFS), MN Department of Natural Resources (MDNR), MN Department of Health (MDH), MN Department of Agriculture (MDA) and the Red Lake and White Earth Native American Bands.  A total of 1,000 lakes was included in the national survey. Minnesota drew 42 lakes as a part of the initial draw for this statistically based national survey effort and added 8 lakes to allow for state-based assessment. All 50 lakes received the national level of assessment and contributed to both the state-based and national assessments. In addition, 100 lakes were added from USEPA’s randomized list of lakes to allow for ecoregion-based assessments (50 per major ecoregion) in Minnesota.

This collaboration and the various survey add-ons were the basis for several “value-added” topics.

  • Emerging contaminant analysis in 50 lakes (MPCA)
  • Pesticide analysis in 50 lakes and triazine analysis in all 150 lakes (MDA)
  • Zooplankton analysis in all 150 lakes (MDNR)
  • Blue-green algal toxin (microcystin) in all 150 lakes (lab analysis by MDH, reporting by MPCA)
  • Water chemistry and profiles in all 150 lakes, including comparisons among 2007 and 2012 results (MPCA)

NLA 2012 statewide reports

A series of reports is being drafted based on the 2012 NLA. These reports or their links will be posted here as they are completed. The following reports are now available:

Minnesota map of 150 lakes included in Minnesota’s 2012 NLA samplingMap: 150 Minnesota lakes included in 2012 NLA sampling
  1. PDF Document Overview of Minnesota’s 2012 Survey (wq-nlap1-08)
    MPCA’s plan to sample 150 lakes as a part of the 2012 NLA was ambitious. Weather conditions in summer 2012 were challenging and included record rainfall events in June and transitioned to severe drought over much of the state by mid-summer. This resulted in numerous lakes being dry or too shallow to sample over much of the state.
  2. PDF Document Pharmaceuticals and Endocrine Active Chemicals in Minnesota Lakes (tdr-g1-16)
    Many previous studies have established that a variety of pharmaceuticals, personal care products (PPCPs), and other chemicals are commonly detected at low concentration in rivers and lakes. However, this was the first study to analyze this suite of chemicals in randomly-selected lakes. Forty-seven of the 50 lakes sampled had at least one of the chemicals that were tested for. The insect repellent DEET was found in 76 percent of the lakes sampled, making this chemical the most frequently discovered.
  3. PDF Document Pesticides in Minnesota Lakes [2012] (Minn. Dept of Agriculture) External Link
    Minnesota was the only state in the 2012 NLA to include comprehensive testing for pesticides as a part of the study. Fifty-two lakes were analyzed using the MDA laboratory’s gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-tandem mass spectrometry (LC-MS/MS) advanced methods for 132 different pesticide compounds. Nineteen different pesticide compounds were detected, with atrazine being discovered most frequently in 67 percent of samples. A comparison of 2012 and 2007 pesticide data notes a decrease in the detection frequency of atrazine and related compounds.

NLA lake-specific reports

These brief reports summarize data for one or more lakes that were included in the study. These reports are prepared as a service to study collaborators, including property owners that have granted access to the lakes. This page will be populated as reports are created.

  1. Lakes on the White Earth Reservation
  2. Lakes on the Red Lake Reservation
  3. Lakes in Tamarac Wildlife Refuge
  4. Lakes in Northeastern Minnesota

More information

For more details on the national study: HTML Content National Lakes Assessment (U.S. EPA) External Link

For additional information about this project, please contact Steve Heiskary at 651-757-2419, or toll-free at 800-657-3864.

Archived reports

NLAP archived statewide reports

This report series will examine statewide patterns in various chemical, physical and biological parameters based on data collected during the NLAP survey.

NLAP archived survey reports for select Minnesota lakes

These lake information sheets contain a brief description of each lake sampled for the Environmental Protection Agency National Lake Assessment Program: general information about lake area and depth, watershed area and land use composition, lake dissolved oxygen and temperature profiles, and water quality data from the survey. The typical range of water quality values for each ecoregion is provided as a basis for comparison. Data tables will be periodically updated as more data becomes available.

CountyLake
DNR Lake ID
EPA NLAP ID
Becker PDF Document Straight
3001000
NLA06608-0366
Becker PDF Document Flat
3024200
NLA06608-1134
Becker PDF Document Pickerel
3028700
NLA06608-0110
Beltrami PDF Document Cass
4003000
NLA06608-0403
Blue Earth PDF Document Eagle (North)
7006001
NLA06608-0279
Cass PDF Document Pine Mountain
11041100
NLA06608-0494
Cass PDF Document Long
11048000
NLA06608-0942
Clay PDF Document North Mayfield
14002900
NLA06608-0558
Cook PDF Document Musquash
16010400
NLA06608-1274
Cook PDF Document Aspen
16020400
NLA06608-0890
Cook PDF Document Vesper
16041400
NLA06608-0782
Cook PDF Document Richey
16064300
NLA06608-1018
Crow Wing PDF Document Lookout
18012300
NLA06608-0771
Crow Wing PDF Document Crow Wing
18015500
NLA06608-0990
Crow Wing PDF Document Pelican
18030800
NLA06608-0238
Crow Wing PDF Document Mayo
18040800
NLA06608-1262
Douglas PDF Document Victoria
21005400
NLA06608-0622
Douglas PDF Document Darling
21008000
NLA06608-1390
Douglas PDF Document Red Rock 
21029100
NLA06608-1454
Douglas PDF Document Fanny
21033600
NLA06608-0686
Hennepin PDF Document Nokomis
27001900
NLA06608-0679
Itasca PDF Document Long (Main Bay)
31026601
NLA06608-0958
Itasca PDF Document Upper Hatch
31077000
NLA06608-0190
Kanabec PDF Document Spring
33002700
NLA06608-1283
Kandiyohi PDF Document Woodcock
34014100
NLA06608-1239
Kandiyohi PDF Document Nest
34015400
NLA06608-0215
Kandiyohi PDF Document Norway
34025100
NLA06608-1383
Lake PDF Document Becoosin
38047200
NLA06608-0526
Lake PDF Document August
38069100
NLA06608-1038
Le Sueur PDF Document Upper Sakatah
40000200
NLA06608-1303
Lincoln PDF Document North Ash
41005500
NLA06608-1111
McLeod PDF Document South
43001400
NLA06608-0167
Mahnomen PDF Document Allen
44015700
NLA06608-0211
Martin PDF Document Okamanpeedan
46005100
NLA06608-0759
Meeker PDF Document Jennie
47001500
NLA06608-1175
Otter Tail PDF Document West Leaf
56011400
NLA06608-0878
Otter Tail PDF Document Fairy
56035600
NLA06608-1326
Otter Tail PDF Document Maine (Round)
56047600
NLA06608-1198
Otter Tail PDF Document Pebble
56082900
NLA06608-0174
Polk PDF Document Unnamed (Arthur)
60030700
NLA06608-0915
Ramsey PDF Document Snail
62007300
NLA06608-1447
St. Louis PDF Document Alruss
69000500
NLA06608-1102
St. Louis PDF Document Spring
69012900
NLA06608-1347
St. Louis PDF Document Arthur
69015400
NLA06608-1342
St. Louis PDF Document Lamb
69034100
NLA06608-1150
St. Louis PDF Document Lost
69061100
NLA06608-0318
Scott PDF Document Fish
70006900
NLA06608-0935
Swift PDF Document North Drywood
76016900
NLA06608-0871
Wright PDF Document Long
86006900
NLA06608-0743
Wright PDF Document Cokato
86026300
NLA06608-0551
Last modified on April 14, 2014 08:11