Grayslake, IL: 3 Health Violations - Home Safety 67/100
1 ZIP code · 5 water systems · Updated
ZipCheckup grade for Grayslake: C.
A mixed picture - some signals here are worth your attention.
Available records for Grayslake give it a middle-tier grade in IL; water systems can differ, so check the one that serves your home.
How Grayslake Compares
Data: EPA SDWIS
What You Should Know About Grayslake Water
- Your city's water systems recorded 72 violations since 2021.
- Average of reported 90th-percentile lead results: 0.012 mg/L.
- Homes built before 1986: 36% - older plumbing may contain lead solder.
- Estimated remediation: $600 per household.
- Health risk index (ZipCheckup composite of CDC data): 11.37.
Who Supplies Your Water in Grayslake
More than one public water system is linked to Grayslake, IL: federal records tie 5 systems to the area, and the 3 with the largest reported service populations are shown below. Which of them supplies a particular address depends on where the property sits, and a water bill or the utility can confirm it.
- C
- C
- C
Overview
We track home safety data for 1 ZIP code in Grayslake, Illinois (population ~35,579), covering 5 community water systems serving approximately 73,387 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.
1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. 3 health-based violations appear in the available health breakdown.
Home Safety Score
Average Home Safety Score for Grayslake: C (67/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Grayslake water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0120 mg/L (EPA action level: 0.015 mg/L)
- 0 of 1 ZIP code with known status exceed the EPA lead action level
Radon Risk
1 of 1 ZIP records with known zones is in EPA Radon Zone 2.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Consumer Confidence Rule | Reporting | 18 | 1 |
| Oxamyl (Vydate) | Organic | 12 | 1 |
| Carbofuran | Organic | 12 | 1 |
| Chlordane | Organic | 12 | 1 |
| Lead and Copper Rule Revisions | Treatment Technique | 12 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 60030 | C | 72 | 3 | Grayslake |
All ZIP Codes in Grayslake
- 60030 [C] - 72 violations ⚠
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
Health Outcomes in Grayslake
Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Top Contaminants in Grayslake Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Grayslake
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
When a home in Grayslake was built matters for lead because federal rules adopted in 1986 limited how much lead new plumbing could contain; the local median build year is 1997. A median sits in the middle of a range, so some homes are older and some newer, and past repairs may have changed the pipes in either group. A plumber can identify the materials inside a home, and a lab test measures what reaches the tap.
Most homes in Grayslake were built after 1986; lead exposure at a tap still depends on its service line and plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Grayslake Homeowners
In Grayslake, estimated remediation comes to 1% or less of the median home value.
Estimated remediation costs in Grayslake can be compared with local home values. The $300–$1,500 estimated range can be set against the median property value; actual costs vary by home. Home values are 50% above the Illinois average.
Lead Exposure Risk for Children in Grayslake
Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
In Grayslake, the average of the 90th-percentile lead results reported for its ZIP codes is at least 0.010 mg/L, the concentration EPA's 2024 rule sets as the lead action level for each water system's own 90th-percentile result starting in November 2027, not for an area average. No single system's compliance follows from this figure, and 36% of local homes predate 1986.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Historical NFIP Claim Context in Grayslake
Historical NFIP data for Grayslake contains 24 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $45,520. Among ZIP codes with claim records, 100% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. The $600 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
What You Can Do in Grayslake
- Test your water at home. City-level data shows averages - your tap may differ. Consider testing your home's tap water for lead, since household plumbing can affect its level.
- Install a certified water filter. For Consumer Confidence Rule, listed in the water-quality records for Grayslake: if it is a rule or reporting requirement rather than a contaminant, ask your utility what the record involved; for bacteria, follow any boil-water notice from your utility; for a specific chemical contaminant, check whether a filter is certified to reduce it. Not every contaminant has a consumer filter certification.
- Check your home's plumbing. With 36% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Grayslake, IL