Lake Forest Tap Water Quality Report
Lake Forest's water record shows an EPA lead 90th percentile above the 15 ppb action level. We recommend using a certified water filter.
Other systems listed for Lake Forest with results above guidelines: ELM OAK MUTUAL WATER SYSTEM (4 above guidelines)
People Served
19,642
Health-based violations since 2020
0
LAKE FOREST. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Is Lake Forest Tap Water Safe to Drink?
We strongly recommend using a certified water filter to reduce exposure: Lake Forest's water record shows an EPA lead 90th percentile above the 15 ppb action level. Check our filter recommendations below for NSF-certified options that can remove the specific contaminants found in Lake Forest's water.
LAKE FOREST, Lake Forest's water system, serves 19,642 people. 1 other system is listed for Lake Forest. Each system's results are listed under its own name, never added to LAKE FOREST's. Water quality testing is conducted regularly and reported to the EPA.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in Illinois
Lake Forest Water Service Areas
What these numbers actually mean for Lake Forest, IL
We read Lake Forest, IL’s published record and send you a short report — which findings warrant a decision, which to ignore, and what to do about it. Including when the answer is nothing.
- An EPA lead 90th percentile above the 15 ppb action level
- 23 results on file
- 23 PFAS compounds on record
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Recommended Water Filters for Lake Forest
Based on Lake Forest's water quality data, these NSF-certified filters are recommended to reduce lead (its water system's EPA lead 90th percentile is above the 15 ppb action level).
Culligan
ZeroWater
NSF Certified:
Flow Rate
1.9 gpm
Daily Production
1 gpd
Highlights:
- Compact design
- Easy to set up
- Affordable
- NSF-42, NSF-53, NSF-401 certified
Removes 19 contaminants:
+14 more
Strontium, Molybdenum, Fluoride, Uranium, Lead, Total PFAS, Chlorine, 25, Phosphorus, Bicarbonate, Calcium, Carbonate, Magnesium, Sodium
Whirlpool Corporation
W11256135
NSF Certified:
Capacity
1001 gal
Filter Life
3 mo
Flow Rate
0.7 gpm
Removes 19 contaminants:
+14 more
Benzene, Carbofuran, Chlorine (Free), Chlorine (Total), Chlorine Dioxide, Chlorobenzene, Cryptosporidium, Ethylbenzene, Lead, Mercury, Metolachlor, Tetrachloroethylene, Toxaphene, Turbidity
Whirlpool Corporation
W11569861
NSF Certified:
Capacity
1001 gal
Filter Life
3 mo
Flow Rate
0.52 gpm
Removes 22 contaminants:
+17 more
Atrazine, Benzene, Carbofuran, Chlorine (Free), Chlorine (Total), Chlorine Dioxide, Chlorobenzene, Cryptosporidium, Ethylbenzene, Lead, Mercury, Metolachlor, Styrene, Tetrachloroethylene, Toxaphene, Trichloroethylene, Turbidity
AquaTru
Classic
NSF Certified:
Flow Rate
0.04 gpm
Daily Production
600 gpd
Highlights:
- Best overall contaminant reduction score
- Most performance certifications
- Lifetime warranty
- NSF-42, NSF-53, NSF-58, NSF-401 certified
Removes 23 contaminants:
+18 more
Molybdenum, Barium, Chlorine, Arsenic, 83+ contaminants, Calcium, Chloride, Copper, Magnesium, Nitrate, Phosphorus, Sodium, Sulfate, Total Dissolved Solids, Zinc, Total THMs, Chloroform, Nitrate (as N)
Verify Your Water Quality with Independent Testing
With an EPA lead 90th percentile above the 15 ppb action level, independent laboratory testing provides a second opinion and can track changes over time.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
What Lake Forest's water readings can explain
We publish a city-level hardness figure for Lake Forest, resolved from its water systems where they report one and estimated from county sampling where they do not. Each page starts with the hot-tap and cold-tap check, then shows what your own water system reported.
On a private well near Lake Forest? Public-water results do not apply to private wells. See Lake County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Lake Forest
Lake Forest's tap water has an estimated 14.6 grains per gallon (250.0 mg/L, county sampling in Lake County) — very hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for an estimated 14.6 gpg water in Lake Forest — equipment and local installation labour for your ZIP code, with the sizing arithmetic shown in full. For the national picture first, read what a water softener costs — equipment, installation labour and ten-year ownership, each separated out. For Illinois as a whole, read water softener cost in Illinois — priced against the plumber wage published for the state.
Frequently Asked Questions About Lake Forest Tap Water
Lake Forest's water record shows an EPA lead 90th percentile above the 15 ppb action level. We strongly recommend using a certified water filter to reduce exposure to these contaminants. Check our filter recommendations below for NSF-certified options that can remove the specific contaminants found in Lake Forest's water.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach LAKE FOREST. For a problem with your water now (discolored water, no water, low pressure, a leak), contact LAKE FOREST directly.
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