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City water profile

Oak Ridge water quality

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

Median indexed hardness

73PPM

One indexed ZIP

Range 72.9–72.9 PPM

State comparison
32 PPM above
State hardness rank
#139 of 381
Matched utilities
10
Active health records
1

City summary

What the indexed records say

Oak Ridge has 1 published ZIP profile across Guilford County. The indexed median is 73 PPM, compared with 41 PPM across North Carolina.

Among the 381 North Carolinacities with an indexed median, Oak Ridge ranks #139from 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. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard1 ZIP
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
63.8 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Aug 2, 2016 to Sep 8, 2022.

ZIP directory

Water reports in Oak Ridge

Open a ZIP for site-level provenance and measurements.

ZIP code

27310

Moderately Hard

72.9 PPM

Nearest site
63.8 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Arbor Run/charles Place S/d

PWSID NC3041039

Groundwater
System population served
576
Last reported
Jun 26, 2026

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

Wilson Farms/auburndale

PWSID NC0241220

Groundwater
System population served
465
Last reported
Jun 26, 2026

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

River Oaks S/d

PWSID NC0241203

Groundwater
System population served
409
Last reported
Jun 26, 2026

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

Ridgecrest/bakersfield S/d

PWSID NC3041066

Groundwater
System population served
343
Last reported
Jun 26, 2026

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

The Estates Of Oak Ridge Lake

PWSID NC0241240

Groundwater
System population served
300
Last reported
Jun 26, 2026

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

Weatherstone S/d

PWSID NC0241206

Groundwater
System population served
269
Last reported
Jun 26, 2026

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

Twelve Oaks S/d

PWSID NC0241211

Groundwater
System population served
234
Last reported
Jun 26, 2026

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

Pepper Ridge S/d

PWSID NC3041051

Groundwater
System population served
185
Last reported
Jun 26, 2026

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

Oak Ridge Military Academy

PWSID NC0241539

Groundwater
System population served
150
Last reported
Jun 26, 2026

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

Smoke Ridge Estates

PWSID NC0241197

Groundwater
System population served
135
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

1 unique active health-based record appears among associated systems. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Combined Radium (-226 and -228)NC3041109Apr 1, 2026Addressed · health-based
Gross Alpha, Excl. Radon and UNC3041130Jan 1, 2026Archived · health-based
Revised Total Coliform RuleNC3041130Nov 1, 2025Resolved
ChlorineNC3041130Nov 1, 2025Resolved
ChlorineNC3041075Nov 1, 2025Resolved
Revised Total Coliform RuleNC3041075Nov 1, 2025Resolved
Gross Alpha, Excl. Radon and UNC3041130Oct 1, 2025Archived · health-based
EndrinNC3041130Oct 1, 2025Resolved
BHC-GAMMANC3041130Oct 1, 2025Resolved
MethoxychlorNC3041130Oct 1, 2025Resolved

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 Oak Ridge

Is the water hard?

The indexed city median is 73 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.