South Lyon, MI (48178): PFAS Detected in Mapped Water Systems
EPA data combined for 9 water systems mapped to this ZIP (largest mapped system: City of South Lyon)
EPA records for the water systems mapped to 48178 in South Lyon, MI contain 10 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 0 are marked health-based.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water EPA records for water systems mapped to this ZIP show 10 violations (non-health) (since 2021).
- Lead The reported 90th-percentile lead result is below the laboratory reporting limit, not a measured zero; EPA's health goal for lead is zero.
- PFAS PFAS detected in UCMR5 sampling; see the PFAS section for each compound, compared with the federal PFAS MCL where one exists.
- Radon EPA Zone 2 - county-level radon potential, not a home measurement.
- Flood 10 cumulative NFIP claim records. Claim evidence is historical, not current map coverage.
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Alerts for South Lyon (48178): 1 high priority, none critical.
Score Breakdown
Overall Home Safety Score: Score unavailable
Required evidence is missing. Missing values remain unknown and are not imputed or renormalized.
Canonical components
Required domains
Coverage: 3 of 4 components and 2 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (7) HIGH
Your Water System
ZIP code 48178 in South Lyon, Michigan is mapped to the water system City of South Lyon (EPA ID: MI0006110). This system provides water to approximately 11,055 people from groundwater sources.
There are 9 community water systems serving this area.
Lead & Copper in Your Water
The EPA requires water systems to monitor lead and copper levels under the Lead and Copper Rule.
| Metal | Measured Level | EPA Action Level | Status | Sample Date or Period |
|---|---|---|---|---|
| Copper | Action-level exceedance on record | 1.3 mg/L | Exceeds action level | Not present in ZipCheckup accepted source data |
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| City of South Lyon, | MI0006110 | 11,055 | Groundwater |
| Lyon Township | MI0003968 | 9,390 | Groundwater |
| Woodland Ridge | MI0040669 | 1,400 | Groundwater |
| Stone Ridge | MI0006423 | 367 | Groundwater |
| Green Oak Twp - Centennial Farms | MI0001543 | 900 | Groundwater |
Other Water Quality Reports in Michigan
- 48001 (Algonac) - 2 violations recorded for mapped water systems
- 48002 (Allenton)
- 48003 (Almont) - 2 violations recorded for mapped water systems
- 48004 (Anchorville)
- 48005 (Armada) - 4 violations recorded for mapped water systems
- 48006 (Avoca)
- 48007 (Troy)
- 48009 (Birmingham) - 6 violations recorded for mapped water systems
- 48012 (Birmingham)
- 48014 (Capac) - 6 violations recorded for mapped water systems
- 48015 (Center Line)
- 48017 (Clawson) - 4 violations recorded for mapped water systems
- 48021 (Eastpointe) - 4 violations recorded for mapped water systems
- 48022 (Emmett)
- 48023 (Fair Haven)
- 48025 (Franklin) - 6 violations recorded for mapped water systems
- 48026 (Fraser) - 8 violations recorded for mapped water systems
- 48027 (Goodells)
- 48028 (Harsens Island)
- 48030 (Hazel Park)
Nearby Water Quality Reports
- 48165 (New Hudson) - 4 mi - 5 violations recorded for mapped water systems
- 48175 (Salem) - 5 mi
- 48189 (Whitmore Lake) - 7 mi - 32 violations recorded for mapped water systems
- 48374 (Novi) - 7 mi
- 48139 (Hamburg) - 8 mi - 3 violations recorded for mapped water systems
- 48116 (Brighton) - 8 mi - 7 violations recorded for mapped water systems
- 48393 (Wixom) - 9 mi - 10 violations recorded for mapped water systems
- 48168 (Northville) - 9 mi - 2 violations recorded for mapped water systems
- 48381 (Milford) - 9 mi - 10 violations recorded for mapped water systems
- 48143 (Lakeland) - 9 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for City of South Lyon (MI0006110) on EPA.gov.
4 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 48178.
Detected compounds: HFPO-DA.
Highest measured level: 0.0054 µg/L
Reverse osmosis (RO) and activated carbon block filters can reduce PFAS at the tap. Certifications list the compounds covered: an NSF/ANSI 53 or 58 claim for PFOA/PFOS does not cover every PFAS, so check that the product lists the compounds detected here.
Environmental Hazards (11) HIGH
Home & Infrastructure (6) OK
Cost & Community (9) HIGH
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in South Lyon
Based on local data for ZIP 48178, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
Home & Flood Insurance
The ZIP code for this report in South Lyon has 10 FEMA flood claims on record. Standard homeowner policies don't cover flood damage - make sure you're protected.
Typical cost: Flood insurance: premiums vary by property and flood zone; request a quote
Check Your Flood Zone (Free)FEMA flood map lookup - see if your property is in a flood zone
Free tip: Check your FEMA flood zone at msc.fema.gov (free lookup)
Service recommendations are based on public data for this ZIP code (FEMA, Census ACS, NWS). Actual needs vary by property. By calling, your information will be shared with an independent service provider. ZipCheckup may receive compensation. Cost estimates are approximate and vary by property, condition, and contractor.
Frequently Asked Questions
Is the tap water in 48178 safe to drink?
EPA SDWIS records 10 violations since 2021 across the water systems mapped to ZIP 48178 (primary system: City of South Lyon), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.
Where does 48178's water come from?
The recorded water source for City of South Lyon, a system mapped to ZIP code 48178, is Groundwater. This system serves approximately 11,055 people.
How can I get my water tested in South Lyon?
If City of South Lyon supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.
What is the radon risk for 48178?
48178 is mapped to a county in EPA Radon Zone 2 (moderate county-level radon potential; EPA recommends testing every home), located in Oakland County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.
Are there PFAS (forever chemicals) in 48178's water?
Yes, PFAS have been detected in samples from water systems mapped to 48178. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.
What does the NFIP claim history show for ZIP 48178?
FEMA records contain 10 flood insurance claims filed in ZIP code 48178; the recorded rated-zone value (the most frequent one if there are several claims) is A, which is claims evidence and may differ from the current FEMA map zone for a property. Claim records do not establish current property risk. Review FEMA's map for the specific property.
How to cite this page
ZipCheckup. (2026). South Lyon, MI (48178): PFAS Detected in Mapped Water Systems. https://zipcheckup.com/report/48178/
@misc{zipcheckup-report-48178,
author = {{ZipCheckup}},
title = {{South Lyon, MI (48178): PFAS Detected in Mapped Water Systems}},
year = {2026},
url = {https://zipcheckup.com/report/48178/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 48178
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 48165 | New Hudson, MI | 3.7 mi | B | 5 |
| 48175 | Salem, MI | 5.4 mi | N/A | 0 |
| 48189 | Whitmore Lake, MI | 6.6 mi | N/A | 32 |
| 48374 | Novi, MI | 7.1 mi | B | 0 |
| 48139 | Hamburg, MI | 7.9 mi | N/A | 3 |
| 48116 | Brighton, MI | 8.1 mi | N/A | 7 |
| 48393 | Wixom, MI | 8.5 mi | B | 10 |
| 48168 | Northville, MI | 8.9 mi | A | 2 |
| 48381 | Milford, MI | 8.9 mi | B | 10 |
| 48143 | Lakeland, MI | 9.1 mi | N/A | 0 |
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