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City water profile

Knightdale water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Knightdale, North Carolina.

Median indexed hardness

47PPM

One indexed ZIP

Range 46.5–46.5 PPM

State comparison
6 PPM above
State hardness rank
#172 of 381
Matched utilities
10
Active health records
2

City summary

What the indexed records say

Knightdale has 1 published ZIP profile across Wake County. The indexed median is 47 PPM, compared with 41 PPM across North Carolina.

Among the 381 North Carolinacities with an indexed median, Knightdale ranks #172from highest to lowest. Across all 519 state ZIP profiles, available estimates run from 4.7to 267.5 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft1 ZIP
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard0 ZIPs

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
2.9 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Aug 2, 2016 to Aug 28, 2024.

ZIP directory

Water reports in Knightdale

Open a ZIP for site-level provenance and measurements.

ZIP code

27545

Soft

46.5 PPM

Nearest site
2.9 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Rockbridge S/d

PWSID NC4092073

Groundwater
System population served
1,042
Last reported
Jun 26, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Amber Acres North S/d

PWSID NC0392346

Groundwater
System population served
752
Last reported
Jun 26, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Amber Ridge S/d

PWSID NC4392182

Groundwater
System population served
742
Last reported
Jun 26, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Sandy Trail S/d

PWSID NC0392077

Groundwater
System population served
739
Last reported
Jun 26, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Rutledge Landing S/d

PWSID NC4392228

Groundwater
System population served
713
Last reported
Jun 26, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Ashley Hills North S/d

PWSID NC0392341

Groundwater
System population served
602
Last reported
Jun 26, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Baywood Forest S/d

PWSID NC0392218

Groundwater
System population served
533
Last reported
Jun 26, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Barclay Downs S/d

PWSID NC0392211

Groundwater
System population served
459
Last reported
Jun 26, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Ridgehaven S/d

PWSID NC0392184

Groundwater
System population served
455
Last reported
Jun 26, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Ashley Hills S/d

PWSID NC0392318

Groundwater
System population served
453
Last reported
Jun 26, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Compliance history

What EPA records show

2 unique active health-based records appear among associated systems. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Gross Alpha, Excl. Radon and UNC0392341Apr 1, 2026Addressed · health-based
Combined UraniumNC0392341Apr 1, 2026Addressed · health-based
Public NoticeNC4092073Mar 2, 2026Addressed
Public NoticeNC4092073Mar 2, 2026Addressed
Revised Total Coliform RuleNC4092073Feb 1, 2026Archived
ChlorineNC4092073Feb 1, 2026Resolved
Revised Total Coliform RuleNC4092073Jan 1, 2026Archived
Gross Alpha, Excl. Radon and UNC4092073Jan 1, 2026Archived · health-based
Combined UraniumNC4092073Jan 1, 2026Archived · health-based
Gross Alpha, Excl. Radon and UNC0392341Jan 1, 2026Archived · health-based

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Knightdale

Is the water hard?

The indexed city median is 47 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.