Detected Radium

Radium in Grayslake, IL Drinking Water

Q: Is radium in Grayslake water safe?

Radium was detected in Grayslake water at 5.5 pCi/L, below the EPA limit of 5 pCi/L (combined Ra-226 + Ra-228). Check ZIP-level data on this page for your specific area.

Q: How much radium is in Grayslake water?

The maximum detected level of radium in Grayslake water is 5.5 pCi/L. The EPA limit is 5 pCi/L (combined Ra-226 + Ra-228). See the ZIP code table above for area-specific levels.

Radium data for Grayslake, Illinois · 35,579 residents · 1 ZIP code

ZipCheckup's reading of Radium in Grayslake, Illinois: the highest detected level is 5.5 pCi/L; the EPA limit is 5 pCi/L (combined Ra-226 + Ra-228). Radium carries a high health-risk designation.

Within Grayslake, Illinois, Radium has been detected in water samples drawn from the public supply - the results are part of the official EPA compliance record for systems here.

5.5 pCi/L

Max Level Detected

5.5 pCi/L

Average Level

5 pCi/L (combined Ra-226 + Ra-228)

EPA MCL

High

Health Risk

Reverse Osmosis or Ion Exchange

Best Filter Method

Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-07-13

Radium in Grayslake Tap Water

Radium has been detected in Grayslake, Illinois drinking water at a maximum level of 5.5 pCi/L — relative to the EPA MCL of 5 pCi/L (combined Ra-226 + Ra-228).

This analysis covers 35,579 residents across 1 ZIP code in Grayslake.

Grayslake's overall water quality grade is C (64/100).

Is Radium in Grayslake Water Safe?

Radium was detected in Grayslake water but currently falls within EPA limits. However, some health organizations argue the EPA MCL may not be protective enough.

If you are concerned, a reverse osmosis or ion exchange filter can reduce radium levels further.

Radium Levels by ZIP Code

ZIP Code	Radium Level	EPA Limit	Status
60030	5.5 pCi/L	5 pCi/L (combined Ra-226 + Ra-228)	Not comparable

Average radium level across Grayslake: 5.5 pCi/L

Health Effects of Radium

Increased risk of bone cancer (radium accumulates in bones)
The body treats radium like calcium, storing it in bones
Lifetime cancer risk of ~1 in 10,000 at 5 pCi/L
No safe threshold for radioactive contamination

Health risk severity: High. Governed by the Radionuclides Rule.

How Radium Gets Into Drinking Water

Natural radioactive decay in underground rock formations
Groundwater sources (especially deep wells)
Mining and industrial waste
Higher in regions with specific geology (Midwest, parts of South)

What to Do About Radium in Grayslake Water

Reverse osmosis (NSF 58 certified) removes 90%+ of radium
Ion exchange (water softeners) can reduce radium
Point-of-use RO at kitchen tap is most cost-effective
GAC filters alone are NOT effective for radium

Look for filters certified under NSF 58 for radium removal.

Home → Contaminants → Radium → Illinois → Grayslake

How to cite this page

APA ZipCheckup. (2026). Radium in Grayslake, IL Drinking Water. https://zipcheckup.com/contaminants/radium/grayslake-il/

BibTeX

@misc{zipcheckup-contaminants-radium-grayslake-il,
  author = {{ZipCheckup}},
  title  = {{Radium in Grayslake, IL Drinking Water}},
  year   = {2026},
  url    = {https://zipcheckup.com/contaminants/radium/grayslake-il/}
}

Data as of July 2026.