ZipCheckup grade for 27545: D.

Federal records show several conditions worth reviewing.

Your top priority: match a filter's certification to the violations (22 health-based violations). Check your ZIP → NSF certified filters

Health Violations Found
D 50

Knightdale, NC (27545): PFAS Detected in Mapped Water Systems - 50/100

EPA data combined for 25 water systems mapped to this ZIP (largest mapped system: Rockbridge S/d)

Health Violations Found PFAS Detected

Health-based violation records by water system:

EPA records for the water systems mapped to 27545 in Knightdale, NC contain 82 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 22 are marked health-based.

Data source: U.S. Environmental Protection Agency (EPA) SDWIS

Based on EPA Drinking Water FEMA Flood Data U.S. Census CDC Energy Information Admin. USGS Water Data & 9 more federal sources
Latest air quality, EPA records and weather alerts Current data temporarily unavailable
Current EPA violation data unavailable
Water records and current conditions
Current EPA violation data unavailable
Safety Score
D 50/100
Water Quality PFAS above MCL 22 health-based violation records
Lead Risk Below action level 0.003 mg/L, 90th percentile, sample period ending 2025-12-31
NFIP Claim History Claim records 6 claims
Data confidence: High (direct measurement) Medium (sampled / sub-geography) Low (modeled / inferred) Methodology →

At a Glance

  • Water EPA records for water systems mapped to this ZIP show 22 health-based violations and 60 non-health-based (since 2021).
  • Lead The reported 90th-percentile lead result of 0.003 mg/L is below the EPA action level for water systems; EPA's health goal for lead is zero.
  • PFAS At least one PFAS result is above an EPA MCL value (UCMR5 sampling; MCL compliance required from 2029).
  • Radon EPA Zone 2 - county-level radon potential, not a home measurement.
  • Flood 6 cumulative NFIP claim records. Claim evidence is historical, not current map coverage.
Contaminant Summary
Health Violations
82 violations 22 health-based PFAS detected
Report data assembled: Jul 27, 2026 EPA water-system identity: source date or period is not present in ZipCheckup's accepted source record EPA violation history: more than two update cycles old Lead, copper and UCMR measurements: source date or period is not present in ZipCheckup's accepted source record
D
ZIP-level Home Safety model score: 50 / 100
Bottom 7% of U.S. ZIP codes
25
Water Systems
1,042
People Served
22
Health Violations (since 2021)Median is 0
Groundwater
Water Source
0.003 mg/L
Reported Lead Result1.3× the national median for this measure
Zone 2
County Radon Potential · Moderate
$301K
Median Home Value48% above state median ($203K)

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Score Breakdown

Overall Home Safety Score: 50/100

This is the published model score. Component and domain values are shown independently; they are not added together on this page.

Canonical components

EPA water compliance
0/100
Observed
PFAS MCL screen
0/100
Observed
EPA radon zone
50/100
Observed
Annual EPA AirData AQI
100/100
Observed

Required domains

Drinking water
0/100
Indoor environment
50/100
Outdoor environment
100/100

Coverage: 4 of 4 components and 3 of 3 domains observed.

Model 4.0.0; series home-safety-v4-cross-vertical.

Safety & Health (7) CRITICAL

Your Water System

ZIP code 27545 in Knightdale, North Carolina is mapped to the water system Rockbridge S/d (EPA ID: NC4092073). This system provides water to approximately 1,042 people from groundwater sources.

There are 25 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
How to read the copper row. EPA's reporting schema defines the copper CU90 code as an action-level exceedance (a system's 90th-percentile copper above the 1.3 mg/L action level), so this row reflects an exceedance on record, not a routine measurement. No copper concentration is shown because no verified unit is available for this value. A system with no copper record has not been shown to be clean: the absence of a recorded exceedance is not a measurement.

Water Systems Serving This Area

System Name EPA ID Population Source
Rockbridge S/d NC4092073 1,042 Groundwater
Sandy Trail S/d NC0392077 739 Groundwater
Amber Acres NC0392236 239 Groundwater
Barclay Downs S/d NC0392211 459 Groundwater
Ashley Hills S/d NC0392318 453 Groundwater

Other Water Quality Reports in North Carolina

Nearby Water Quality Reports

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Rockbridge S/d (NC4092073) 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.

📊 EPA Safe Drinking Water · View source →

Compliance History

2021 2022 2023 2024 1 2025 2
Health-based (MCL/TT) Other violations

PFAS Contamination Detected

PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 27545. One or more compound results are above the level of a federal PFAS MCL with compliance required from 2029.

Detected compounds: PFBA, PFOS, PFPeA, PFHxA, PFBS.

Highest measured level: 0.009 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.

📊 EPA UCMR5 · View source →
Environmental Hazards (11) MODERATE
Home & Infrastructure (7) OK
Cost & Community (9) HIGH

CPSC product recall notices

These national notices are not matched to this ZIP code or water system.

View all recalls →

📊 CPSC · View source →

Protect Your Home in Knightdale

Based on local data for ZIP 27545, 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 Knightdale has 6 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 27545 safe to drink?

EPA SDWIS records 82 violations since 2021 across the water systems mapped to ZIP 27545 (primary system: Rockbridge S/d), including 22 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 27545's water come from?

The recorded water source for Rockbridge S/d, a system mapped to ZIP code 27545, is Groundwater. This system serves approximately 1,042 people.

How does Knightdale water compare to the national average?

Knightdale's Home Safety Score ranks lower than 93% of U.S. ZIP codes, and lower than 100% of ZIP codes within North Carolina.

How can I get my water tested in Knightdale?

If Rockbridge S/d 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.

Is lead a concern in 27545 tap water?

The Lead and Copper Rule record selected for 27545 reports a 90th-percentile lead result of 0.003 mg/L for a water system mapped to this ZIP (record date 2025-12-31). The EPA action level is 0.015 mg/L. This result is below the EPA action level; it does not show the lead level in each home.

What is the radon risk for 27545?

27545 is mapped to a county in EPA Radon Zone 2 (moderate county-level radon potential; EPA recommends testing every home), located in Wake 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 27545's water?

Yes, PFAS have been detected in samples from water systems mapped to 27545. One or more PFAS results are above the level of a federal PFAS MCL with compliance required from 2029. 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 27545?

FEMA records contain 6 flood insurance claims filed in ZIP code 27545; the recorded rated-zone value (the most frequent one if there are several claims) is X, 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

APA ZipCheckup. (2026). Knightdale, NC (27545): PFAS Detected in Mapped Water Systems - 50/100. https://zipcheckup.com/report/27545/
BibTeX 
@misc{zipcheckup-report-27545,
  author = {{ZipCheckup}},
  title  = {{Knightdale, NC (27545): PFAS Detected in Mapped Water Systems - 50/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/27545/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 27545

ZIP Code City, State Distance Grade Violations
27629 Raleigh, NC 4.4 mi N/A 0
27591 Wendell, NC 5.6 mi C 19
27610 Raleigh, NC 6.3 mi D 46
27604 Raleigh, NC 6.3 mi C 2
27616 Raleigh, NC 6.7 mi C 14
27611 Raleigh, NC 7.7 mi N/A 0
27620 Raleigh, NC 7.7 mi N/A 0
27621 Raleigh, NC 7.7 mi N/A 0
27622 Raleigh, NC 7.7 mi N/A 0
27623 Raleigh, NC 7.7 mi N/A 0

Contaminants Detected in 27545

Learn more about the contaminants found in your water supply:

Overall safety breakdown

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Coverage: 15/17 risk factors Data sources →
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