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City water profile

Dover water quality

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

Median indexed hardness

54PPM

3 indexed ZIPs

Range 51.7–53.7 PPM

State comparison
1 PPM below
State hardness rank
#18 of 37
Matched utilities
8
Active health records
0

City summary

What the indexed records say

Dover has 3 published ZIP profiles across Kent County. The indexed median is 54 PPM, compared with 55 PPM across Delaware.

Among the 37 Delawarecities with an indexed median, Dover ranks #18from highest to lowest. Across all 48 state ZIP profiles, available estimates run from 47.3to 82.4 PPM.

The 51.7–53.7 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft3 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard0 ZIPs

3 of 3 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
1.5 miles
Profiles with evidence
3/3

Confidence labels

High: 0Moderate: 3Low: 0

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

ZIP directory

Water reports in Dover

Open a ZIP for site-level provenance and measurements.

ZIP code

19901

Soft

53.7 PPM

Nearest site
0.1 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

19902

Soft

51.7 PPM

Nearest site
1.5 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

19904

Soft

53.7 PPM

Nearest site
2.7 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Dover Water Department

PWSID DE0000571

Groundwater
System population served
39,491
Last reported
Apr 30, 2026

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

Lakeland/beechwood Pump District

PWSID DE0000546

Groundwater
System population served
459
Last reported
Apr 30, 2026

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

Kitts Hummock Improvement Assoc

PWSID DE0000545

Groundwater
System population served
305
Last reported
Apr 30, 2026

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

Hunters Pointe Pump District

PWSID DE0000104

Groundwater
System population served
261
Last reported
Apr 30, 2026

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

Voshells Cove Pump District

PWSID DE0000125

Groundwater
System population served
252
Last reported
Apr 30, 2026

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

Dover Air Park

PWSID DE0000573

Groundwater
System population served
252
Last reported
Apr 30, 2026

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

Willow Tree Properties Llc

PWSID DE0000134

Groundwater
System population served
123
Last reported
Apr 30, 2026

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

Village Of Grandview

PWSID DE0000572

Groundwater
System population served
108
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
Consumer Confidence RuleDE0000572Jul 1, 2010Addressed
Consumer Confidence RuleDE0000572Jul 1, 2009Addressed
Lead and Copper RuleDE0000545Jan 1, 1994Unaddressed
Lead and Copper RuleDE0000545Jul 1, 1993Unaddressed

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 Dover

Is the water hard?

The indexed city median is 54 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.