Washington, DC (20240): PFAS Detected in Mapped Water Systems
EPA data for D.c. Water and Sewer Authority
EPA records for the water systems mapped to 20240 in Washington, DC contain 4 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 0 are marked health-based.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water EPA records for water systems mapped to this ZIP show 4 violations (non-health) (since 2021).
- Lead The reported 90th-percentile lead result of 0.002 mg/L is below the EPA action level for water systems; EPA's health goal for lead is zero.
- PFAS PFAS detected in UCMR5 sampling; see the PFAS section for each compound, compared with the federal PFAS MCL where one exists.
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Compiled data for Washington (20240) captures 1 condition at the high-priority tier - no finding in this dataset meets the critical threshold.
Score Breakdown
Overall Home Safety Score: Score unavailable
Required evidence is missing. Missing values remain unknown and are not imputed or renormalized.
Canonical components
Required domains
Coverage: 3 of 4 components and 2 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (7) HIGH
Your Water System
ZIP code 20240 in Washington, District of Columbia is mapped to the water system D.c. Water and Sewer Authority (EPA ID: DC0000002). This system provides water to approximately 632,323 people from surface water sources.
Other Water Quality Reports in District of Columbia
- 20001 (Washington) - 4 violations recorded for mapped water systems
- 20002 (Washington) - 4 violations recorded for mapped water systems
- 20003 (Washington) - 4 violations recorded for mapped water systems
- 20004 (Washington) - 4 violations recorded for mapped water systems
- 20005 (Washington) - 4 violations recorded for mapped water systems
- 20006 (Washington) - 4 violations recorded for mapped water systems
- 20007 (Washington) - 4 violations recorded for mapped water systems
- 20008 (Washington) - 4 violations recorded for mapped water systems
- 20009 (Washington) - 4 violations recorded for mapped water systems
- 20010 (Washington) - 4 violations recorded for mapped water systems
- 20011 (Washington) - 4 violations recorded for mapped water systems
- 20012 (Washington) - 4 violations recorded for mapped water systems
- 20013 (Washington)
- 20015 (Washington) - 4 violations recorded for mapped water systems
- 20016 (Washington) - 4 violations recorded for mapped water systems
- 20017 (Washington) - 4 violations recorded for mapped water systems
- 20018 (Washington) - 4 violations recorded for mapped water systems
- 20019 (Washington) - 4 violations recorded for mapped water systems
- 20020 (Washington) - 4 violations recorded for mapped water systems
- 20022 (Washington)
Nearby Water Quality Reports
- 20456 (Washington) - <1 mi
- 20570 (Washington) - <1 mi
- 20431 (Washington) - <1 mi
- 20435 (Washington) - <1 mi
- 20451 (Washington) - <1 mi
- 20555 (Washington) - <1 mi
- 20433 (Washington) - <1 mi
- 20006 (Washington) - <1 mi - 4 violations recorded for mapped water systems
- 20506 (Washington) - <1 mi
- 20355 (Washington) - <1 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for D.c. Water and Sewer Authority (DC0000002) on EPA.gov.
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 20240.
Detected compounds: PFPeA, PFHxA.
Highest measured level: 0.0047 µg/L
Reverse osmosis (RO) and activated carbon block filters can reduce PFAS at the tap. Certifications list the compounds covered: an NSF/ANSI 53 or 58 claim for PFOA/PFOS does not cover every PFAS, so check that the product lists the compounds detected here.
Environmental Hazards (8) HIGH
Home & Infrastructure (2) OK
Cost & Community (6) OK
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Frequently Asked Questions
Is the tap water in 20240 safe to drink?
EPA SDWIS records 4 violations since 2021 across the water systems mapped to ZIP 20240 (primary system: D.c. Water and Sewer Authority), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.
Where does 20240's water come from?
The recorded water source for D.c. Water and Sewer Authority, a system mapped to ZIP code 20240, is Surface water. This system serves approximately 632,323 people.
How can I get my water tested in Washington?
If D.c. Water and Sewer Authority supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.
Is lead a concern in 20240 tap water?
The Lead and Copper Rule record selected for 20240 reports a 90th-percentile lead result of 0.002 mg/L for a water system mapped to this ZIP (record date 2025-12-31). The EPA action level is 0.015 mg/L. This result is below the EPA action level; it does not show the lead level in each home.
Are there PFAS (forever chemicals) in 20240's water?
Yes, PFAS have been detected in samples from water systems mapped to 20240. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.
How to cite this page
ZipCheckup. (2026). Washington, DC (20240): PFAS Detected in Mapped Water Systems. https://zipcheckup.com/report/20240/
@misc{zipcheckup-report-20240,
author = {{ZipCheckup}},
title = {{Washington, DC (20240): PFAS Detected in Mapped Water Systems}},
year = {2026},
url = {https://zipcheckup.com/report/20240/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 20240
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 20456 | Washington, DC | <1 mi | N/A | 0 |
| 20570 | Washington, DC | <1 mi | N/A | 0 |
| 20431 | Washington, DC | <1 mi | N/A | 0 |
| 20435 | Washington, DC | <1 mi | N/A | 0 |
| 20451 | Washington, DC | <1 mi | N/A | 0 |
| 20555 | Washington, DC | <1 mi | N/A | 0 |
| 20433 | Washington, DC | <1 mi | N/A | 0 |
| 20006 | Washington, DC | <1 mi | N/A | 4 |
| 20506 | Washington, DC | <1 mi | N/A | 0 |
| 20355 | Washington, DC | <1 mi | N/A | 0 |
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