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City water profile

New Castle water quality

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

Median indexed hardness

79PPM

One indexed ZIP

Range 79–79 PPM

State comparison
24 PPM above
State hardness rank
#5 of 37
Matched utilities
5
Active health records
0

City summary

What the indexed records say

New Castle has 1 published ZIP profile across New Castle County. The indexed median is 79 PPM, compared with 55 PPM across Delaware.

Among the 37 Delawarecities with an indexed median, New Castle ranks #5from 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

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
1 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jan 4, 2016 to Jun 10, 2026.

ZIP directory

Water reports in New Castle

Open a ZIP for site-level provenance and measurements.

ZIP code

19720

Moderately Hard

79 PPM

Nearest site
1 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Veolia Water Delaware, Inc

PWSID DE0000564

Surface water
System population served
100,495
Last reported
Apr 30, 2026

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

Municipal Services Commission

PWSID DE0000634

Groundwater
System population served
5,549
Last reported
Apr 30, 2026

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

Hunters Run

PWSID DE0020139

Groundwater
System population served
683
Last reported
Apr 30, 2026

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

Kingsmill

PWSID DE0020140

Groundwater
System population served
381
Last reported
Apr 30, 2026

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

Glasgow Pines Ii

PWSID DE0020138

Groundwater
System population served
235
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.

No violation records are included in the current lookback window.

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 New Castle

Is the water hard?

The indexed city median is 79 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.