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Review government records associated with South Lyon, Michigan.
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Preparing South Lyon environmental records...
Check your water bill for your utility name and confirm the reporting year. See EPA’s guide to finding your annual water quality report.
Public water-system records for South Lyon, MI from EPA SDWIS.
South Lyon, City of
PFAS detected below the official threshold used by this report.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 11,055 people
Data from EPA SDWIS
PFAS screening separates EPA UCMR5 drinking-water monitoring from nearby DoD PFAS investigation-site records; EPA samples shown are from Feb 2025.
Drinking Water PFAS Monitoring
EPA UCMR5 samples public water systems. These results are separate from nearby PFAS cleanup or investigation-site records.
PFAS detections below EPA limits.
Nearby PFAS Investigation Sites
DoD records are nearby site investigations, not South Lyon drinking-water detections. Record names come from the source database and can be broad.
No DoD PFAS investigation records shown for this report.
EPA ATTAINS records identify assessed water bodies that do not meet water-quality standards for designated uses.
Davis Creek
Reported: Nov 2026
Health-relevant causes: Mercury, Pathogens, Per- And Polyfluoroalkyl Substances (pfas), Pesticides, Polychlorinated Biphenyls (pcbs)
Affected uses: Fishconsumption, Recreation
Data from EPA ATTAINS
NPDES permits regulate pollutant discharges into U.S. waterways. Facilities must report compliance quarterly.
Violation records
Last inspected: Dec 2025
Last inspected: Dec 2025
Last inspected: Dec 2025
Data from EPA ECHO
To investigate water contamination, check the sampling locations, dates and results below. For tap water records, see Drinking water quality above.
Reviewed: source records as of 2026
Review historical EPA air pollution records, including monitoring and facility emissions where available. For current conditions, check local air quality on AirNow.
Oakland County
Assessment year: 2020
According to EPA, a cancer risk of 30-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 30 may develop cancer from that exposure. This is in addition to cancer risk from all other causes.
Top modeled source groups
Data from EPA AirToxScreen
EPA designations apply to a specific pollutant and federal air quality standard (NAAQS). EPA can issue a clean-data determination while a formal designation remains in effect.
Detroit: Ozone
NonattainmentModerate8-Hour Ozone (2015 Standard)
Health effects (EPA): Respiratory inflammation, aggravation of asthma, reduced lung function (EPA)
Maintenance areas
Previously nonattainment; currently meeting the standard and monitored under an EPA maintenance plan.
Detroit-Ann Arbor
PM2.5 · PM-2.5 (2006 Standard)
Classification: Former Subpart 1
Original designation: Dec 2009
Current design value: 33 µg/m³ (2023-2025)
Historical designations under the revoked 1997 ozone standard
These records describe historical designations. EPA revoked the 1997 ozone standard on April 6, 2015.
Detroit-Ann Arbor Area
Historical standard: 0.08 ppm (8-hour)
Historical designation: Maintenance · Subpart 2/Marginal
Original designation: Jun 2004
Open data source: EPA final revocation ruleContinuing requirements have not been verified for this area.
Data from EPA Green Book
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Ann Arbor
Annual mean: 0.041 Parts per million
Observation year: 2025
Eliza Howell-Nr — Detroit, Michigan
Annual mean: 0.7 Parts per million
Observation year: 2025
Annual mean: 21.8 Parts per billion
Observation year: 2025
Data from EPA AQS
Facilities regulated under the Clean Air Act. CAA HPV flags indicate serious noncompliance such as exceeding emission limits.
Air Violations
Last inspected: Dec 2025
Data from EPA ECHO
TRI releases are self-reported annual totals (calendar year 2024). Hover fugitive or stack for definitions.
Michigan Seamless Tube LLC
Reported: 2024
Reviewed: source query run Nov 2026
Brownfield sites are properties where redevelopment is complicated by the presence of hazardous substances.
Open data source: Search EPA ECHONo matching brownfield records with active cleanup or investigation status surfaced for this city report.
Reviewed: active/open records as of Q1 2026
Facilities with hazardous-waste handler records under RCRA in the reviewed 5-mile city-center search area. Active handler status is separate from air, water, or other ECHO compliance violations, which are shown in their own sections.
Active RCRA handler records in the reviewed city search area
No release reports shown in this group.
Reviewed: active/open records as of 2018
Data from EPA UST Finder
Reviewed: reporting year 2024
No MSHA mine or extraction site records shown for this report.
Oakland County, MI
EPA Radon Zone Map (June 2024 release)
Oakland County is EPA Radon Zone 2 (moderate potential). EPA defines Zone 2 counties as having predicted average indoor screening levels between 2 pCi/L and 4 pCi/L.
Radon levels can vary from home to home, so EPA recommends testing the property to know its indoor level.
FEMA flood zones describe mapped flood hazards. Look up a specific address with FEMA.
Special Flood Hazard Area — 1% annual chance of flooding (100-year floodplain). No base flood elevation determined.
Results use an earlier stored RMP inventory. Current EPA ECHO location coverage is unverified.
EPA ECHO lists facilities linked to the Risk Management Program. Results include facilities with locations that can be matched. Records may be historical. Current operations, chemical inventories, and recent accident history are unverified.
Reviewed: 2000-present
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
Oakland County, MichiganPop. 1,269,431
County Health Rankings edition: 2024
Premature Death
Poor or Fair Health
Poor Physical Health Days
Poor Mental Health Days
Adult Smoking
Adult Obesity
Air Pollution - Particulate Matter
Drinking water violation indicator
Diabetes Prevalence
Life Expectancy
| Indicator | County | State | National |
|---|---|---|---|
| Premature Death | 5,946 | 8,468 | 7,972 |
| Poor or Fair Health | 11.1% | 15.2% | 14.2% |
| Poor Physical Health Days | 2.7 | 3.6 | 3.3 |
| Poor Mental Health Days | 4.7 | 5.3 | 4.8 |
| Adult Smoking | 12.3% | 17.9% | 15.0% |
| Adult Obesity | 29.7% | 34.6% | 34.0% |
| Air Pollution - Particulate Matter | 7.8 | 6.8 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 7.2% | 9.3% | 9.6% |
| Life Expectancy | 79.4 | 76.6 | 77.6 |
EPA testing found PFAS in water samples from the City of South Lyon. Results dated Feb 24, 2025 include HFPO-DA at 0.0054 micrograms per liter.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 5 violations for the City of South Lyon.
Check your water bill to identify the utility serving your address. Ask that utility about current drinking water advisories.
Nearby EPA monitoring stations provide annual air quality measurements for South Lyon.
The monitoring station at Ann Arbor recorded an annual average of 0.041 Parts per million for ozone in 2025.
The monitoring station at Eliza Howell-Nr, Detroit, Michigan recorded an annual average of 0.7 Parts per million for carbon monoxide in 2025.
The monitoring station at Eliza Howell-Nr, Detroit, Michigan recorded an annual average of 21.8 Parts per billion for nitrogen dioxide in 2025.
The radon data for South Lyon covers Oakland County. EPA places this area in Zone 2, with a predicted average indoor radon screening level of 2 to 4 picocuries per liter.
No Superfund sites were returned for this city report.
This city report shows 1 brownfield site: 600 N Mill Street.
The county data for South Lyon reports a life expectancy of 79.4 years in Oakland County, Michigan.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for South Lyon reports 5,946 years of life lost to deaths before age 75 per 100,000 residents in Oakland County, Michigan. This measure adds up the years lost to early deaths and adjusts for differences in population age.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for South Lyon lists fine-particle pollution (PM2.5) at 7.8 micrograms per cubic meter in Oakland County, Michigan.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.