ZIP 19891: Wilmington, DE Tap Water
ZIP 19891 is in the Wilmington, DE area, most likely served by WILMINGTON WATER DEPARTMENT. A ZIP is a postal boundary, not a service area, so confirm your supplier on your water bill.
Test results for WILMINGTON WATER DEPARTMENT
Results describe the water system, not a specific tap in ZIP 19891. Each bar marks the listed reference for that substance.
- above a listed reference
- 1
- detected, within reference or no limit
- 5
- aesthetic measures
- 0
- tested, not detected
- 25
- PFOAPerfluorooctanoic acid (PFOA)9.9ng/L4.0 ng/L federal MCL (2024)Above EPA's 2024 limit (one sample) · EPA UCMR 5 · 2023Evidence
- PFBSPerfluorobutanesulfonic acid (PFBS)3.6ng/L2,000 ng/L EPA health advisory (screening, not a legal limit)Below the listed reference · EPA UCMR 5 · 2023Evidence
- PFHxAPerfluorohexanoic acid (PFHxA)21.1ng/L400,000 ng/L Michigan EGLE state MCL (strictest US state)Below the listed reference · EPA UCMR 5 · 2023Evidence
- PFBAPerfluorobutanoic acid (PFBA)14.1ng/LNo federal or state limit; shown for transparencyNo federal or state limit · EPA UCMR 5 · 2023Evidence
- PFHpAPerfluoroheptanoic acid (PFHpA)8.4ng/LNo federal or state limit; shown for transparencyNo federal or state limit · EPA UCMR 5 · 2023Evidence
- PFPeAPerfluoropentanoic acid (PFPeA)32.2ng/LNo federal or state limit; shown for transparencyNo federal or state limit · EPA UCMR 5 · 2023Evidence
Not measured: no utility report on file. Hardness affects fixtures and appliances, not health.
Below each lab’s reporting limit. A result, not zero, and it covers only what was tested.
Show all 25Hide list
- 11Cl-PF3OUdS
- 4:2 FTS
- 6:2 FTS
- 8:2 FTS
- 9Cl-PF3ONS
- ADONA
- HFPO-DA (GenX)
- NEtFOSAA
- NFDHA
- NMeFOSAA
- PFDA
- PFDoA
- PFEESA
- PFHpS
- PFHxS
- PFMBA
- PFMPA
- PFNA
- PFOS
- PFPeS
- PFTA
- PFTrDA
- PFUnA
- Lithium
- Lead (90th percentile)
Go from this record to a decision.
One result is above its listed reference. Lead mostly enters from building plumbing, which this system-level record can’t see.
- UNDERSTANDThe Wilmington city report
The same system record, with every finding and its source.
Open city report → - SOLVETreatment for PFAS
Reverse osmosis, or carbon certified for PFAS. Check for NSF/ANSI 53 or 58, with PFOA/PFBS/PFHxA/PFBA/PFHpA/PFPeA named on the listing.
See treatment → - TESTTest your own tap
The only way to see what your building adds.
How to test →
Frequently asked
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Follow ZIP 19891's water →Which water system serves ZIP 19891?
The public system on record for ZIP 19891 (Wilmington, DE) is WILMINGTON WATER DEPARTMENT. A ZIP is a postal boundary, not a service area. Confirm your supplier on your water bill.
Is the water in ZIP 19891 the same as Wilmington's?
ZIP 19891 falls within the Wilmington, DE area, but a ZIP code can span more than one utility. Read the serving system's own record for the results that apply to your address.
How do I find the exact water system for ZIP 19891?
Check the utility name on your water bill, or resolve it from your street address with Find My Water. The ZIP-level view lists candidate systems, not a confirmed household match.