Welcome to H2Know

A digital investigation for high school students to explore the science of water quality challenges in Lake Erie.

40 million people rely on the Great Lakes for water.

Learn about the critical steps taken from lake to glass.

Agriculture accounts for 65% of land use in Ohio’s Western Lake Erie Basin.

Get perspective from farmers and researchers as they develop strategies to protect water quality.

Introduction to H2Know

The H2Know case study invites you to investigate a water quality issue in Lake Erie. Here, you will gather information about the problem, consider potential contributors and environmental factors, review data and research happening in the field, and engage in discussions and activities related to effective solutions that will improve the water quality of Lake Erie. Please begin by answering the pre-test questions below.

Lake Erie Pre-Test

As it relates to water resources, what is an HAB?

Question 1 of 8

What areas are, or can be, affected by HABs?

Question 2 of 8

Which of these is NOT a contributing factor of HAB?

Question 3 of 8

Effects of HABs include all except:

Question 4 of 8

What are the 4Rs?

Question 5 of 8

On a scale of 1-10, with 1 being “not at all interested” and 10 being “extremely interested” what degree do you believe farmers and members of the agriculture and fertilizer industries have an interest in protecting water quality in North America?


Question 6 of 8

Which state or province is your school located in?

Question 7 of 8

Please select the best description for the community that you live:

Question 8 of 8


Explore H2Know

Section 01

The Issue

Start by discovering an issue that led to a water ban impacting more than 400,000 residents in Toledo, Ohio, in 2014.

Section 02

Science of HABs

Is Lake Erie the perfect environment for algae? Learn about its limnological characteristics and the history of this issue.

Section 03

Watershed Dynamics

Study the Western Lake Erie Watershed to look for activities that may impact water quality.

Section 04

Research and Management

What research, strategies and technologies can farmers use to help protect water quality?

Section 05

Solutions and Strategies

Many people, including legislators, conservation groups and farmer organizations, are working on solutions. Which efforts will be effective?