How hard is the water in Dover, DE?

Utility-reported hardness is unavailable in this index. Regional environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

Local water dashboard

Official source aggregation

Water quality in Dover, DE 19904

Q: Is tap water safe in Dover?

EPA SDWIS shows no active health-based violation in this profile's reporting window. That is not the same as proving every contaminant is absent, and federal data can lag state and utility records.

Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Kent County.

Historical measurement record needs context

Largest possible serving system: Dover Water Department
Source water: Groundwater
County: Kent County
Profile updated: Apr 30, 2026

Your tap water

What does the utility report?

Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.

Utility hardness unavailable in this index

Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.

Find an official utility report →

Convert a hardness result →Test your tap →

At a glance

What the current records say

EPA quarter 2026Q2

Utility-reported hardness

Unavailable

Ask your provider or test your tap

All possible systems

No active flag

0 active health-based records

Measurements by utility

Choose your provider

Each result belongs to a specific system.

Utility match

8 systems

Serves 39,491 people system-wide

Match the name on your water bill

Your utility’s measurements and compliance records

These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.

EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.

Dover Water Department

DE0000571 · Groundwater · 39,491 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0.002 mg/L
Action level: 0.015 mg/L

13% of the listed benchmark

Monitoring period: Jan 1, 2022 to Dec 31, 2024

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Lakeland/beechwood Pump District

DE0000546 · Groundwater · 459 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 2.9e-4 mg/L
Action level: 0.015 mg/L

2% of the listed benchmark

Monitoring period: Jan 1, 2022 to Dec 31, 2024

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Kitts Hummock Improvement Assoc

DE0000545 · Groundwater · 305 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0.007 mg/L
Action level: 0.015 mg/L

47% of the listed benchmark

Monitoring period: Jan 1, 2013 to Dec 31, 2021

Violation history (2)

Imported violation history for Kitts Hummock Improvement Assoc
Rule	Status	Period
Lead and Copper Rule	Unaddressed	Jan 1, 1994
Lead and Copper Rule	Unaddressed	Jul 1, 1993

Hunters Pointe Pump District

DE0000104 · Groundwater · 261 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 2.1e-4 mg/L
Action level: 0.015 mg/L

1% of the listed benchmark

Monitoring period: Jan 1, 2023 to Dec 31, 2025

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Voshells Cove Pump District

DE0000125 · Groundwater · 252 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0.002 mg/L
Action level: 0.015 mg/L

13% of the listed benchmark

Monitoring period: Jan 1, 2023 to Dec 31, 2025

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Dover Air Park

DE0000573 · Groundwater · 252 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0 mg/L
Action level: 0.015 mg/L

0% of the listed benchmark

Monitoring period: Jan 1, 2014 to Dec 31, 2022

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Willow Tree Properties Llc

DE0000134 · Groundwater · 123 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (2)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0 mg/L
Action level: 0.015 mg/L

0% of the listed benchmark

Monitoring period: Jan 1, 2022 to Dec 31, 2024

Copper (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Above action level

Reported level: 3.21 mg/L
Action level: 1.3 mg/L

247% of the listed benchmark

Monitoring period: Jul 11, 1993 to Jan 10, 1994

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Village Of Grandview

DE0000572 · Groundwater · 108 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0 mg/L
Action level: 0.015 mg/L

0% of the listed benchmark

Monitoring period: Jan 1, 2014 to Dec 31, 2022

Violation history (2)

Imported violation history for Village Of Grandview
Rule	Status	Period
Consumer Confidence Rule	Addressed	Jul 1, 2010
Consumer Confidence Rule	Addressed	Jul 1, 2009

Hardness meter

What does nearby environmental evidence show?

Moderately Hard

64.1

PPM as CaCO₃

Moderately Hard

PPM

64.1

GPG

3.7

Regional environmental evidence

USGS hardness classification scale

64.1 PPM

Soft
0–60Moderate
61–120Hard
121–180Very hard
181+

Parts per million

64.1

mg/L as CaCO₃ equivalent

Grains per gallon

3.7

1 GPG ≈ 17.1 PPM

How to use regional evidence

These samples describe nearby environmental water. They cannot establish whether your tap water is soft or hard. Use a utility result or a tap test for appliance settings and treatment sizing.

USGS sites used

Nearest site

2.7 mi

Observation range

Jan 6, 2016–Jun 11, 2025

Regional evidence confidence

High

Median of the latest source-type-aligned hardness observation at each monitoring site within 25 miles. Nearest monitoring location: Ic43-01 (Well).USGS source documentation ↗Evidence tier: Regional environmental evidence. This value is not used as proof of the serving utility's treated-water hardness.

Regional context

Is 19904 typical?

These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.

Dover median

64 PPM

About the same

3 indexed ZIP readings · Range 63.3–64.9 PPM

Delaware median

63 PPM

About the same

48 indexed ZIP readings · Range 31.1–129 PPM

Evidence-first next steps

Confirm the problem before choosing treatment

This profile can help you ask the right question. It cannot select equipment for a property without a current result from the serving utility or the tap.

Confirm the serving system

ZIP boundaries and utility service areas do not perfectly match. Verify the system on a water bill before relying on system-wide records.

Read the current utility report

A reported action-level record needs context. Check its monitoring period and the utility's current report.

Find an official utility report →

Test for the decision you face

Use a tap hardness test before sizing a softener. For health concerns, use a certified laboratory and the correct sampling protocol.

Convert your hardness test result →

Nearby indexed reports

More local profiles in Dover

Estimates can differ across a city because monitoring locations and associated systems differ.

View all Dover reports →

ZIP 19902

Regional context

63.3PPM · environmental

ZIP 19901

Regional context

64.9PPM · environmental

Frequently asked

Water questions for Dover

Is tap water safe in Dover?+

EPA ECHO shows no active health-based violation for the associated systems in this reporting snapshot. This does not prove every contaminant is absent; federal records can lag and household plumbing can change tap conditions.

How hard is the water?+

Utility-reported hardness is unavailable in this index. Regional samples do not establish tap-water hardness. Ask your provider or test your tap.

Do I need a water softener?+

Confirm hardness at your tap and consider actual scale or spotting before choosing treatment. Regional environmental values cannot determine whether you need a softener. A softener addresses hardness, not every contaminant.