Bethesda, MD (20894): High Radon Potential Area
EPA data for Washington Suburban Sanitary Commission
EPA records for the water systems mapped to 20894 in Bethesda, MD contain zero recorded violations for inclusive record years 2021 through 2026. This does not establish that every category was monitored or published, and it does not cover events outside that source window.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water No drinking-water violations in EPA records since 2021.
- Lead The reported 90th-percentile lead result is below the laboratory reporting limit, not a measured zero; 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.
- Radon EPA Zone 1 - highest county-level potential. This is not a home measurement; test before any threshold comparison.
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Safety datasets compiled for 20894 in Bethesda return 1 finding at the high-priority level - each is backed by source data and classification criteria, and the critical tier of the same record shows no entries.
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 20894 in Bethesda, Maryland is mapped to the water system Washington Suburban Sanitary Commission (EPA ID: MD0150005). This system provides water to approximately 1,900,000 people from surface water sources.
Other Water Quality Reports in Maryland
- 20588 (Dhs)
- 20601 (Waldorf) - 3 violations recorded for mapped water systems
- 20602 (Waldorf) - 3 violations recorded for mapped water systems
- 20603 (Waldorf) - 3 violations recorded for mapped water systems
- 20604 (Waldorf)
- 20606 (Abell)
- 20607 (Accokeek) - 3 violations recorded for mapped water systems
- 20608 (Aquasco)
- 20609 (Avenue)
- 20610 (Barstow)
- 20611 (Bel Alton) - 3 violations recorded for mapped water systems
- 20612 (Benedict)
- 20613 (Brandywine) - 2 violations recorded for mapped water systems
- 20615 (Broomes Island)
- 20616 (Bryans Road) - 1 violation recorded for mapped water systems
- 20617 (Bryantown)
- 20618 (Bushwood)
- 20619 (California) - 12 violations recorded for mapped water systems
- 20620 (Callaway) - 1 violation recorded for mapped water systems
- 20621 (Chaptico) - 4 violations recorded for mapped water systems
Nearby Water Quality Reports
- 20813 (Bethesda) - <1 mi
- 20827 (Bethesda) - <1 mi
- 20848 (Rockville) - <1 mi
- 20859 (Potomac) - <1 mi
- 20875 (Germantown) - <1 mi
- 20884 (Gaithersburg) - <1 mi
- 20889 (Bethesda) - <1 mi
- 20897 (Suburb Maryland Fac) - <1 mi
- 20898 (Gaithersburg) - <1 mi
- 20899 (Gaithersburg) - <1 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Washington Suburban Sanitary Commission (MD0150005) on EPA.gov.
4 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 20894.
Detected compounds: PFPeA, PFHxA.
Highest measured level: 0.0067 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 (9) MODERATE
Home & Infrastructure (4) MODERATE
Cost & Community (5) 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 20894 safe to drink?
EPA SDWIS records 0 violations since 2021 across the water systems mapped to ZIP 20894 (primary system: Washington Suburban Sanitary Commission), 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 20894's water come from?
The recorded water source for Washington Suburban Sanitary Commission, a system mapped to ZIP code 20894, is Surface water. This system serves approximately 1,900,000 people.
How can I get my water tested in Bethesda?
If Washington Suburban Sanitary Commission 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.
What is the radon risk for 20894?
20894 is mapped to a county in EPA Radon Zone 1 (high county-level radon potential; EPA recommends testing every home), located in Montgomery County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.
Are there PFAS (forever chemicals) in 20894's water?
Yes, PFAS have been detected in samples from water systems mapped to 20894. 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). Bethesda, MD (20894): High Radon Potential Area. https://zipcheckup.com/report/20894/
@misc{zipcheckup-report-20894,
author = {{ZipCheckup}},
title = {{Bethesda, MD (20894): High Radon Potential Area}},
year = {2026},
url = {https://zipcheckup.com/report/20894/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 20894
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 20813 | Bethesda, MD | <1 mi | N/A | 0 |
| 20827 | Bethesda, MD | <1 mi | N/A | 0 |
| 20848 | Rockville, MD | <1 mi | N/A | 0 |
| 20859 | Potomac, MD | <1 mi | N/A | 0 |
| 20875 | Germantown, MD | <1 mi | N/A | 0 |
| 20884 | Gaithersburg, MD | <1 mi | N/A | 0 |
| 20889 | Bethesda, MD | <1 mi | N/A | 0 |
| 20897 | Suburb Maryland Fac, MD | <1 mi | N/A | 0 |
| 20898 | Gaithersburg, MD | <1 mi | N/A | 0 |
| 20899 | Gaithersburg, MD | <1 mi | N/A | 0 |
Nearby ZIP Code Reports
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