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Review government records associated with Knightdale, North Carolina.
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Preparing Knightdale 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 Knightdale, NC from EPA SDWIS.
Middlesex Water System
Active monitoring or reporting issue detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City-area ZIP code · Serves 1,389 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 PFASNo 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.
Wake 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.
Maintenance areas
Previously nonattainment; currently meeting the standard and monitored under an EPA maintenance plan.
Raleigh-Durham Area
CO · Carbon Monoxide (1971 Standard)
Classification: Moderate <= 12.7ppm
Original designation: Jan 1992
Current design value: 1.5 ppm (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.
Raleigh-Durham-Chapel Hill Area
Historical standard: 0.08 ppm (8-hour)
Historical designation: Maintenance · Former Subpart 1
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.
Millbrook School — Raleigh, North Carolina
Annual mean: 0.2 Parts per million
Observation year: 2025
Annual mean: 0.3 Parts per billion
Observation year: 2025
Annual mean: 0.038 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.
Argos Knightdale Concrete Plant
Reported: 2024
Thomas Concrete - Knightdale
Reported: 2024
Reviewed: source query run Nov 2026
Reviewed: source query run Nov 2026
State environmental agencies maintain cleanup site databases that include state Superfund, voluntary cleanup, and brownfield remediation programs. These programs track additional sites beyond those on the federal NPL.
1 site with active cleanup or investigation
US 64, KNIGHTDALE
0.7 miles away · WAKE County
Reported: Nov 2026
Data from EPA ECHO
Release reports
Reported: Dec 2021
Data from EPA UST Finder
Reviewed: reporting year 2024
No MSHA mine or extraction site records shown for this report.
Wake County, NC
EPA Radon Zone Map (June 2024 release)
Wake 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.
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.
Wake County, North CarolinaPop. 1,175,021
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 | 5,151 | 8,853 | 7,972 |
| Poor or Fair Health | 10.8% | 14.4% | 14.2% |
| Poor Physical Health Days | 2.7 | 3.3 | 3.3 |
| Poor Mental Health Days | 4.0 | 4.5 | 4.8 |
| Adult Smoking | 10.5% | 15.0% | 15.0% |
| Adult Obesity | 31.6% | 36.4% | 34.0% |
| Air Pollution - Particulate Matter | 10.2 | 7.8 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 8.8% | 11.0% | 9.6% |
| Life Expectancy | 81.2 | 76.6 | 77.6 |
This report does not have PFAS sample results for the candidate water systems in Knightdale.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 34 violations for Middlesex Water System, including 1 marked active.
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 Knightdale.
The monitoring station at Millbrook School, Raleigh, North Carolina recorded an annual average of 0.2 Parts per million for carbon monoxide in 2025.
The monitoring station at Millbrook School, Raleigh, North Carolina recorded an annual average of 0.3 Parts per billion for sulfur dioxide in 2025.
The monitoring station at Millbrook School, Raleigh, North Carolina recorded an annual average of 0.038 Parts per million for ozone in 2025.
The radon data for Knightdale covers Wake 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 or brownfield sites were returned for this city report.
The county data for Knightdale reports a life expectancy of 81.2 years in Wake County, North Carolina.
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 Knightdale reports 5,151 years of life lost to deaths before age 75 per 100,000 residents in Wake County, North Carolina. 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 Knightdale lists fine-particle pollution (PM2.5) at 10.2 micrograms per cubic meter in Wake County, North Carolina.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.