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Review government records associated with Mount Airy, Maryland.
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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 Mount Airy, MD from EPA SDWIS.
Town of Mount Airy
Active monitoring or reporting issue detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 9,890 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 Apr 2023 to Oct 2023.
Drinking Water PFAS Monitoring
EPA UCMR5 samples public water systems. These results are separate from nearby PFAS cleanup or investigation-site records.
8 PFAS sample results above EPA limits
Sample period: Apr 2023 to Oct 2023
UCMR5 results are sampled by public water system, not every household. Confirm your water provider before treating these as tap-water results for a specific address.
| Chemical | Concentration (µg/L) | EPA Limit (µg/L) | Sample date | Over Limit |
|---|---|---|---|---|
| PFOA | 0.0127 | 0.0040 | 2023-10-11 | Yes |
| PFOS | 0.0060 | 0.0040 | 2023-04-12 | Yes |
| PFOA | 0.0060 | 0.0040 | 2023-10-11 | Yes |
| PFOS | 0.0059 | 0.0040 | 2023-10-11 | Yes |
| PFOA | 0.0051 | 0.0040 | 2023-04-12 | Yes |
| PFOA | 0.0045 | 0.0040 | 2023-10-11 | Yes |
| PFOA | 0.0044 | 0.0040 | 2023-04-12 | Yes |
| PFOA | 0.0042 | 0.0040 | 2023-04-12 | Yes |
PFAS detections below EPA limits.
Nearby PFAS Investigation Sites
DoD records are nearby site investigations, not Mount Airy drinking-water detections. Record names come from the source database and can be broad.
No DoD PFAS investigation records shown for this report.
No health-relevant impairment records shown among the assessment records in this report.
Reviewed: source records as of 2026
NPDES permits regulate pollutant discharges into U.S. waterways. Facilities must report compliance quarterly.
Violation records
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.
Carroll 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.
Baltimore: Ozone
NonattainmentSerious8-Hour Ozone (2015 Standard)
Health effects (EPA): Respiratory inflammation, aggravation of asthma, reduced lung function (EPA)
1997 Primary Annual PM2.5 Designations
Baltimore
EPA revoked the 1997 primary annual PM2.5 standard in this redesignated area.
Original designation: Apr 2005
Open data source: EPA final primary annual revocation ruleOpen data source: EPA designation statusHistorical designations under the revoked 1997 ozone standard
These records describe historical designations. EPA revoked the 1997 ozone standard on April 6, 2015.
Baltimore Area
Historical standard: 0.08 ppm (8-hour)
Historical designation: Nonattainment · Subpart 2/Serious
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.
Baltimore County near Road — Lochearn, Maryland
Annual mean: 23.8 Parts per billion
Observation year: 2025
Frederick Airport
Annual mean: 0.044 Parts per million
Observation year: 2025
Howard County near Road — North Laurel, Maryland
Annual mean: 0.2 Parts per million
Observation year: 2025
Data from EPA AQS
Reviewed: source records as of Q4 2025
Reviewed: source query run Nov 2026
Reviewed: source query run Nov 2026
No release reports shown in this group.
Reviewed: active/open records as of 2018
Data from EPA UST Finder
No MSHA mine or extraction site records shown for this report.
Carroll County, MD
EPA Radon Zone Map (June 2024 release)
Carroll County is EPA Radon Zone 1 (highest potential). EPA defines Zone 1 counties as having predicted average indoor screening levels above 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.
No FEMA flood-zone records shown for this report.
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.
PHMSA tracks incidents involving natural gas and hazardous liquid pipelines. Incidents include leaks, ruptures, and explosions.
No records dated within the last 5 years surfaced for this city report.
Reviewed: last 5 years
Data from PHMSA
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
Carroll County, MarylandPop. 175,305
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 | 6,489 | 7,921 | 7,972 |
| Poor or Fair Health | 11.5% | 13.1% | 14.2% |
| Poor Physical Health Days | 3.0 | 2.8 | 3.3 |
| Poor Mental Health Days | 4.9 | 4.4 | 4.8 |
| Adult Smoking | 12.6% | 10.2% | 15.0% |
| Adult Obesity | 31.4% | 34.2% | 34.0% |
| Air Pollution - Particulate Matter | 8.5 | 7.3 | 7.3 |
| Drinking water violation indicator | No | N/A | N/A |
| Diabetes Prevalence | 7.9% | 9.8% | 9.6% |
| Life Expectancy | 78.3 | 78.0 | 77.6 |
EPA testing found PFAS in water samples from the Town of Mount Airy. Results dated Apr 12, 2023 to Oct 11, 2023 include PFPeA at 0.0042 to 0.0227 micrograms per liter and PFHxA at 0.0041 to 0.0184 micrograms per liter.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 4 violations for the Town of Mount Airy.
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 Mount Airy.
The monitoring station at Baltimore County Near Road, Lochearn, Maryland recorded an annual average of 23.8 Parts per billion for nitrogen dioxide in 2025.
The monitoring station at Frederick Airport recorded an annual average of 0.044 Parts per million for ozone in 2025.
The monitoring station at Howard County Near Road, North Laurel, Maryland recorded an annual average of 0.2 Parts per million for carbon monoxide in 2025.
The radon data for Mount Airy covers Carroll County. EPA places this area in Zone 1, with a predicted average indoor radon screening level above 4 picocuries per liter.
No Superfund or brownfield sites were returned for this city report.
The county data for Mount Airy reports a life expectancy of 78.3 years in Carroll County, Maryland.
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 Mount Airy reports 6,489 years of life lost to deaths before age 75 per 100,000 residents in Carroll County, Maryland. 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 Mount Airy lists fine-particle pollution (PM2.5) at 8.5 micrograms per cubic meter in Carroll County, Maryland.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
Federal pipeline records list an incident involving Baltimore Gas & Electric Co near Mount Airy on Feb 16, 2011. The reported release was natural gas.