Mount Prospect, Illinois

Mount Prospect, Illinois Mount Prospect, Illinois

What is the Water Quality in Mount Prospect, Illinois?

Compared to other US cities, Mount Prospect water quality ranks in the lmiddle range for contamination excluding Lead.

Most of their 22 contaminants have cancer-causing attributes.

  • Radium levels are over the legal limit of 5 pCi/L.
  • Chloroform levels are 54x the health guidelines.

Let’s look closer at what’s in Mount Prospect water.

What’s in Mount Prospect water?

Here are the top 5 chemical compounds in your water and what health issues they can potentially cause:

  1. Bromodichloromethane – Potential effect: Cancer
  2. Chloroform – Potential effect: Cancer
  3. Hexavalent Chromium – Potential effect: Cancer
  4. Haloacetic acids (HAA5) – Potential effect: Cancer
  5. Total trihalomethanes – Potential effect: Cancer

These are five of the 22 contaminants analyzed by the Environmental Working Group (

11 of these contaminants are rated as exceeding EWG Health Guidelines.

Does Mount Prospect have Lead contamination?

Yes, Mount Prospect has lead in its water. The most recent Lead samples collected from 2015 through 2017 showed concentrations up to 3.9 parts per billion.

The legal limit for lead is 15 parts per billion. Being well-below this level is a good thing.

Concentrations between 3.8 ppb and 15 ppb put a formula-fed baby at risk of elevated blood lead levels. Read more about the symptoms of Lead in water.

There is no safe level of lead for humans.

The good news is that 99.99% of the lead can be filtered out.

See the What Can You Do? section below to learn how to filter out contaminants.

Where does Mount Prospect’s water come from?

Mount Prospect’s water comes from the Weller Creek – Des Plaines River watershed.

7 of the 8 water sources in the Weller Creek – Des Plaines River watershed are in Impaired or Unknown condition. These include:

  • Beck
  • Big Bend
  • Des Plaines River
  • Opeka

Ideally, a water source would be rated in Good condition. Only Axehead is in good condition.

Learn more from How’s My Waterway

See below for what you can do to improve Mount Prospect’s water.

What Can You Do?

Information about water quality in Mount Prospect can be surprising and downright scary.

But there are things you can do in your home to clean up your water.

To Remove Lead and Other Contaminants In Your Home:

There is one solution that beats Brita, PUR, and expensive whole house systems.

  • It costs less per gallon.
  • Needs fewer filter changes.
  • And it doesn’t make your water taste weird.

  • Use Berkey filters with activated carbon to filter out at least 65.4% of contaminants in your drinking water.
    • Berkey filters can also remove up to 99.99% of Lead in Mount Prospect water.
    • Brita can filter 11 of the 22 contaminants and Lead depending on the filter.
    • Note: We may receive a commission if you decide to purchase filters through links on this page.
  • To filter out 18 of the 22 contaminants in your whole house, consider a whole house water filtration system.
    • These are typically more expensive than pitchers to purchase, but can be more effective.
    • They have the benefit of filtering out heavy hitters like:
      • Barium
      • Bromodichloromethane
      • Chloroform
      • Chromium (hexavalent)
      • Chromium (total)
      • Fluoride
      • Haloacetic acids
      • Molybdenum
      • Radium
      • Strontium
      • Total trihalomethanes
      • Trichloroacetic acid

In Your Community:

Contact your local government officials and put pressure on them to invest in cleaner waterways and upgraded city water filtration and treatment.

Go to: to find contact information for your local officials.

Water Quality in Other Illinois Cities

Illinois Water Quality Page

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