Lake Monitoring Program

There are 27 lakes which have been identified as have high value, whether economical or environmental, and these lakes are monitored on a rotating basis.  PRWD collects water chemistry samples and lake profile data on the selected lakes to understand overall lake health and trends.  Samples are collected on a bi-weekly basis May through September. 

Field Data includes:

  • Temperature
  • pH
  • Dissolved Oxygen
  • Conductivity
  • Water Clarity (Secchi Depth)

Chemistry Data includes:

  • Total Phosphorus
  • Orthophosphate (Dissolved)
  • Chlorophyll-a

Lake assessments are done each year for lakes that are monitored and are included in the Annual Monitoring Report.

2017 Water Quality Monitoring Report

2018 Water Quality Monitoring Report

Specific Lake characteristics and summaries are in the link below.


Detroit Lake Curfman Lake Floyd Lake Little Floyd Lake
Lake Sallie Lake Melissa Long Lake Munson Lake
Johnson/Reeves Glawe Lake Fox Lake St. Clair Lake
Meadow Lake  Lind Lake    


Lake Level Monitoring

Lake level in recorded by a staff gage located throughout the District.  Gages are read on a bi-weekly basis.  Water levels for Detroit, Melissa, Sallie, and the Floyd Lake chain are updated bi-weekly on the tab to the right.

Monitoring Plan

Each year, the District prepares a plan that identifies the monitoring location and goals for the program.  The current monitoring plan can be viewed below.

2019 Water Quality Monitoring Plan

Discover PRWD
I am a...

Upcoming Meetings and Events

PRWD in the News

PRWD/MN DNR Zebra Mussel impact study

MPR News Story on PRWD Flowering Rush Project

Dan Gunderson, MPR News, visited Lake Sallie with Brent Alcott to discuss the success of the…

MnDNR begins ZM pilot project treatment

View All

Recent Water Levels
Detroit 1334.66 ft
Last Updated: 5/28/2019
Floyd(s) 1354.91 ft
Last Updated: 5/23/2019

Melissa 1329.05 ft
Last Updated: 5/28/2019
Sallie 1330.48 ft
Last Updated: 5/28/2019

Connect with Us