Skip to content

City water profile

Delmar water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Delmar, Delaware.

Median indexed hardness

59PPM

One indexed ZIP

Range 58.6–58.6 PPM

State comparison
4 PPM above
State hardness rank
#9 of 37
Matched utilities
4
Active health records
0

City summary

What the indexed records say

Delmar has 1 published ZIP profile across Sussex County. The indexed median is 59 PPM, compared with 55 PPM across Delaware.

Among the 37 Delawarecities with an indexed median, Delmar ranks #9from highest to lowest. Across all 48 state ZIP profiles, available estimates run from 47.3to 82.4 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
0.9 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jan 6, 2016 to Jun 3, 2026.

ZIP directory

Water reports in Delmar

Open a ZIP for site-level provenance and measurements.

ZIP code

19940

Soft

58.6 PPM

Nearest site
0.9 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Delmar Utility Comm (tn Of Delmar)

PWSID DE0000567

Groundwater
System population served
2,027
Last reported
Apr 30, 2026

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

Country Grove

PWSID DE0020020

Groundwater
System population served
426
Last reported
Apr 30, 2026

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

Holly Oak Mobile Home Park

PWSID DE0000568

Groundwater
System population served
210
Last reported
Apr 30, 2026

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

Stage Village Mhc

PWSID DE0000569

Groundwater
System population served
93
Last reported
Apr 30, 2026

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

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Groundwater RuleDE0000569Nov 28, 2022Resolved
Consumer Confidence RuleDE0000569Jul 1, 2022Resolved
Lead and Copper RuleDE0000568Jan 1, 1994Unaddressed
Lead and Copper RuleDE0000569Jan 1, 1994Unaddressed

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 Delmar

Is the water hard?

The indexed city median is 59 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.