Is Thurmont tap water safe to drink?
- District 15, Thurmont, MD
- District 20, Lewistown, MD
- District 4, Creagerstown, MD
- Gateway
- Colonial Heights
- Altogether
- Catoctin Highlands
- Thurmont West
- Catoctin Heights
The short answer for Thurmont
Thurmont tap water has 3 contaminants above EPA guidelines, including PFOA at 3.0× the limit (tested October 2025). See the full compound-by-compound breakdown and filter recommendations.
The health risk for Thurmont
- PFHxS, PFOA, PFOS above limit.
PFOA (a PFAS 'forever chemical') was detected above EPA limits. These filters are independently certified to reduce common drinking-water contaminants.
Here's what actually removes PFAS from your water
The right filter eliminates PFAS at the tap. But not all filters do - and the type you choose matters for your home.
Common pitchers like Brita do not remove PFAS. You need a filter independently certified to NSF P473 (for pitcher filters) or NSF/ANSI 58 (for reverse osmosis systems). All three options below carry the relevant certification.
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| PFOA Tested: October 2025 · TOWN OF THURMONT |
0.012 µg/L | 0.004 µg/L | 200% above limit |
| PFOS Tested: October 2025 · TOWN OF THURMONT |
0.011 µg/L | 0.004 µg/L | 175% above limit |
| PFHxS Tested: October 2025 · TOWN OF THURMONT |
0.005 µg/L | 0.004 µg/L | 18% above limit |
| PFBS Tested: October 2025 · TOWN OF THURMONT |
0.003 µg/L | 0.003 µg/L | 100% of limit |
View all tested compounds
TOWN OF THURMONT · Tested: October 2025
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| PFOA | 0.012 µg/L | 0.004 µg/L | 200% above limit |
| PFOS | 0.011 µg/L | 0.004 µg/L | 175% above limit |
| PFHxS | 0.005 µg/L | 0.004 µg/L | 18% above limit |
| PFBS | 0.003 µg/L | 0.003 µg/L | 100% of limit |
| lithium | <9.000 µg/L | 10 µg/L | Below limit |
| HFPO-DA | <0.005 µg/L | 0.01 µg/L | Below limit |
| PFNA | <0.004 µg/L | 0.01 µg/L | Below limit |
| PFHxA | <0.003 µg/L | 3 µg/L | Below limit |
| PFBA | <0.005 µg/L | 6 µg/L | Below limit |
| 11Cl-PF3OUdS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 4:2 FTS | <0.003 µg/L | 0.003 µg/L | Below limit |
| 6:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 8:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 9Cl-PF3ONS | <0.002 µg/L | 0.002 µg/L | Below limit |
| ADONA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDoA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpS | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFPeA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFTrDA | <0.007 µg/L | 0.007 µg/L | Below limit |
| PFUnA | <0.002 µg/L | 0.002 µg/L | Below limit |
Water utilities serving ZIP 21788
Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.
- TOWN OF THURMONTAction advised
Frequently Asked Questions about ZIP 21788 Tap Water
What contaminants are above EPA limits in ZIP 21788?
ZIP 21788 has 3 contaminants above EPA health guidelines in the latest available data, including PFOA at 3.0x the EPA guideline. The full table on this page lists every tested compound and its measured level.
Will boiling ZIP 21788 tap water remove PFOA?
No. Boiling does not remove PFAS, and the compounds can actually become more concentrated as water evaporates. To reduce PFAS at home, use a filter independently certified to NSF/ANSI P473 (activated-carbon pitcher or under-sink) or NSF/ANSI 58 (reverse osmosis).
Do basic pitcher filters remove PFOA?
Most basic pitcher filters are only certified to NSF/ANSI 42 or 53, which do not cover PFAS. Look for a filter independently certified to NSF/ANSI P473 (activated-carbon pitcher or under-sink) or NSF/ANSI 58 (reverse osmosis) on the spec sheet.
Who provides tap water in ZIP 21788?
Public records identify TOWN OF THURMONT as a primary water system associated with ZIP 21788. Service boundaries can vary by address, so confirm exact service with the utility.
When was ZIP 21788 tap water last tested?
The most recent test date used in this report is October 2025. EnviroClarity last refreshed this page on 2026-05-05.
Where can I find the official water quality report for ZIP 21788?
Every U.S. public water system is required to publish an annual Consumer Confidence Report (CCR). Contact TOWN OF THURMONT or visit their website for the latest official report covering ZIP 21788. The EPA also maintains a national CCR locator.
Check another ZIP code
Nearby ZIP reports
- 21702 - District 21, Tuscarora, Frederick tap water report
- 21783 - District 7, Smithsburg, Cavetown tap water report
- 21793 - Walkersville tap water report
- 17214 - Blue Ridge Summit tap water report
- 21720 - Cavetown tap water report
- 17250 - Rouzerville tap water report
- 21701 - District 13, Mount Pleasant, Frederick tap water report
- 21787 - Taneytown tap water report
Data reflects publicly reported utility records from EPA datasets and local utility disclosures. This information is educational and not medical advice.