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Review government records associated with Millsboro, Delaware.
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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 Millsboro, DE from EPA SDWIS.
Millsboro Water Department
No active drinking-water issues detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 8,568 people
Data from EPA SDWIS
Reviewed: source records as of Q1 2026
EPA UCMR5 — No PFAS detection records shown for these water systems
Open data source: EPA UCMR5DoD PFAS — No investigation records shown for this report
Open data source: DoD PFASEPA ATTAINS records identify assessed water bodies that do not meet water-quality standards for designated uses.
Swan Creek-Indian River
Reported: Nov 2026
Health-relevant causes: Metals (other Than Mercury), Pathogens
Affected uses: Ecological, 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
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.
Sussex County
Assessment year: 2020
According to EPA, a cancer risk of 20-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 20 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 designates an area as nonattainment when air quality does not meet federal health-based standards (NAAQS) for a specific pollutant.
Seaford: Ozone
NonattainmentMarginal8-Hour Ozone (2008 Standard)
Original designation: Jul 2012
Health effects (EPA): Respiratory inflammation, aggravation of asthma, reduced lung function (EPA)
Historical designations under the revoked 1997 ozone standard
These records describe historical designations. EPA revoked the 1997 ozone standard on April 6, 2015.
Philadelphia-Wilmington-Atlantic City Area
Historical standard: 0.08 ppm (8-hour)
Historical designation: Nonattainment (NAAQS revoked) · Subpart 2/Moderate
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.
Lewes Spm Site, near Ud Acid Rain/Mercury Collectors
Annual mean: 0.2 Parts per billion
Observation year: 2025
Annual mean: 0.041 Parts per million
EPA primary exceedance count: 1 (Ozone 8-hour 2015)
Observation year: 2025
Seaford Shipley State Service Center
Annual mean: 0.043 Parts per million
Observation year: 2025
Data from EPA AQS
Reviewed: source records as of Q4 2025
TRI releases are self-reported annual totals (calendar year 2024). Hover fugitive or stack for definitions.
Allen Harim Foods LLC - Millsboro
Reported: 2024
EPA records for current, proposed and formerly listed Superfund sites on the National Priorities List (NPL).
Open data source: Search EPA ECHOEPA FRS Registry ID 110039012305
Reported: Nov 2021
EPA FRS Registry ID 110008310416
Reported: Nov 2021
Reviewed: source query run Nov 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.
Sussex County, DE
EPA Radon Zone Map (June 2024 release)
Sussex County is EPA Radon Zone 3 (low potential). EPA defines Zone 3 counties as having predicted average indoor screening levels below 2 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.
Minimal flood hazard — outside the 1% and 0.2% annual chance floodplains.
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.
Sussex County, DelawarePop. 255,956
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 | 8,596 | 8,590 | 7,972 |
| Poor or Fair Health | 14.6% | 14.0% | 14.2% |
| Poor Physical Health Days | 3.5 | 3.3 | 3.3 |
| Poor Mental Health Days | 4.6 | 4.4 | 4.8 |
| Adult Smoking | 15.0% | 14.3% | 15.0% |
| Adult Obesity | 35.0% | 33.8% | 34.0% |
| Air Pollution - Particulate Matter | 7.6 | 7.6 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 9.5% | 9.9% | 9.6% |
| Life Expectancy | 77.8 | 77.4 | 77.6 |
This report does not have PFAS sample results for the candidate water systems in Millsboro.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 1 violation for Millsboro Water Department.
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 Millsboro.
The monitoring station at Lewes Spm Site, Near Ud Acid Rain/Mercury Collectors recorded an annual average of 0.2 Parts per billion for sulfur dioxide in 2025.
The monitoring station at Lewes Spm Site, Near Ud Acid Rain/Mercury Collectors recorded an annual average of 0.041 Parts per million for ozone in 2025.
The monitoring station at Seaford Shipley State Service Center recorded an annual average of 0.043 Parts per million for ozone in 2025.
The radon data for Millsboro covers Sussex County. EPA places this area in Zone 3, with a predicted average indoor radon screening level below 2 picocuries per liter.
This city report shows 2 Superfund sites: Millsboro Tce; Ncr Corp. (Millsboro Plant).
No brownfield sites were returned for this city report.
The county data for Millsboro reports a life expectancy of 77.8 years in Sussex County, Delaware.
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 Millsboro reports 8,596 years of life lost to deaths before age 75 per 100,000 residents in Sussex County, Delaware. 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 Millsboro lists fine-particle pollution (PM2.5) at 7.6 micrograms per cubic meter in Sussex County, Delaware.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.