MyCleanWater

Wilmington, Delaware Water Quality Report

Water quality data for 7 water systems serving 210,375 people.

0
Very Poor
out of 100

Water Source

7
Water Systems
210K
People Served
Surface water, Ground water
Water Source

Detected Contaminants

ContaminantDetected LevelEPA Limit (MCL)Health Guideline% of LimitStatus
PFBA0.041 No federal limit1000.0 ug/L(EWG)
0%
Below guideline
PFBS0.004 No federal limit2000.0 ug/L(EPA Health Advisory)
0%
Below guideline
PFDA0.005 No federal limit0.006 ug/L(EWG)
78%
Below guideline
PFHpA0.028 No federal limit1000.0 ug/L(EWG)
0%
Below guideline
PFHxA0.032 No federal limit1000.0 ug/L(EWG)
0%
Below guideline
PFNA0.012 0.010 ug/L—
116%
Above limit
PFOA0.024 0.004 ug/L0.090 ug/L(EWG)
610%
Above limit
PFPeA0.032 No federal limit1000.0 ug/L(EWG)
0%
Below guideline
PFUnA0.004 No federal limit——No federal limit

Recommended Water Filters

Based on the contaminants detected in your water supply, these filtration systems are recommended:

Reverse Osmosis (RO)

Reverse osmosis systems remove up to 99% of PFAS compounds. Recommended for homes with detected PFAS.

Up to 99% PFAS removal

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Compliance & Violations

Active Violations (47)

2E

Feb 1, 2025

critical

4G

Feb 1, 2025

minor

Violation

Unknown

minor

Violation

Unknown

minor

Violation

Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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minor

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minor

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Unknown

minor

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minor

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minor

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minor

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minor

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minor

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minor

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minor

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minor

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minor

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minor

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minor

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minor

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minor

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minor

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minor

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minor

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minor

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minor

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minor

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minor

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Unknown

minor

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Unknown

minor

Violation

Unknown

minor

Resolved Violations (205)

19

Aug 1, 2025 — Aug 31, 2025

moderate

3A

Aug 1, 2025 — Aug 31, 2025

minor

3A

Dec 1, 2024 — Dec 31, 2024

minor

19

Dec 1, 2024 — Dec 31, 2024

moderate

19

Aug 1, 2024 — Aug 31, 2024

moderate

+ 200 more resolved violations

Frequently Asked Questions

Is Wilmington tap water safe to drink?

Wilmington's water has 2 contaminants detected above EPA limits. While the water is treated, residents may want to consider additional filtration.

What contaminants are in Wilmington tap water?

9 contaminants have been detected in Wilmington's water supply across 7 water systems. See the full contaminant table above for details.

How can I improve my water quality in Wilmington?

Install a water filter rated for the specific contaminants found in Wilmington's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.

Does Wilmington have any water quality violations?

Yes, Wilmington currently has 47 active violations. See the violations section above for details.