Calvert County (Prince Frederick system)

Public water system · Maryland · serves 4,371 people · source: Groundwater (Aquia + Magothy aquifers) · PWS ID MD0040011

High Risk

4 contaminants above health guidelines

At 1,746× the EWG health guideline, one glass of this tap water carries what 1,746 glasses should.

What’s in the water

× = times the EWG health guideline

ArsenicCancer

×1,746

Total trihalomethanes (TTHMs)Cancer

×73

Haloacetic acids (HAA5)Cancer

×24

Radium, combined (-226 and -228)Cancer

×7

What actually fixes it

your free test confirms the right fit

Carbon / pitcher filter

Cuts chlorine taste & some byproducts. A good first step — misses nitrate, chromium-6 & PFAS.

Reverse Osmosis (RO)

Under-sink drinking-water system — removes the widest range: byproducts, nitrate, chromium-6 & PFAS.

Whole-home + RO

Softener / carbon for every tap, plus RO at the kitchen for what whole-home can’t catch.

$0 · No obligation

See what’s really in your home’s water

Scan the code to schedule a free in-home water test with a licensed local technician — tap, pressure, hardness & a plain-English plan.

Or call (703) 997-9757

Scan to schedule

Report prepared by SwiftPro Heating, Cooling & Plumbing · VA Class A Contractor License #2705192276 · Fully insured · 4230 Lafayette Center Dr, Suite N, Chantilly, VA 20151 · (703) 997-9757 · [email protected]
Water data via the EWG Tap Water Database (June 2026); this report is not affiliated with EWG. Levels are the latest reported system-wide averages and vary by home and season — an in-home test measures your actual tap. Full lab-style detail at https://myfreewaterreport.com/water/calvert-county.