City of Manassas Utilities water, explained
Manassas is one of the few DMV cities with its own reservoir and plant. Its water profile is different from Fairfax Water, which is why we never size a Manassas system from county-wide assumptions.
Water utility
City of Manassas Utilities
- Hardness
- Moderately hard (confirm)
- Moderately hard (confirm) (approximate, confirm with latest report)
- Disinfectant
- Not yet confirmed
- We confirm before ordering media
- Source
- Lake Manassas (Broad Run), treated at the city-owned plant
Serves: The City of Manassas and, by purchase, the City of Manassas Park.
Checked September 2026. Source: City of Manassas.
Hardness: Moderately hard (confirm)
Lake Manassas is a reservoir source in the Piedmont, so hardness is expected to be moderate. We confirm the current figure from the city report before sizing a softener. Anything above 7 grains per gallon is classified as hard. In practice that means scale on fixtures and shower glass, spotted dishes and mineral buildup inside water heaters and tankless units.
Disinfectant: Not yet confirmed
Disinfectant type not yet confirmed from the city report. We verify before specifying carbon media.
Seasonal changes: Check the city's annual report for seasonal changes.
PFAS
Ask for the latest city PFAS monitoring results. Reverse osmosis at the kitchen tap addresses PFAS regardless of the source.
Lead
Old Town Manassas has pre-1950 housing where older plumbing is common. Lead does not come from the treatment plant. It comes from older home plumbing: pre-1986 solder, older brass fixtures and, in some neighborhoods, lead service lines. A point-of-use filter certified to NSF/ANSI 53 for lead, or reverse osmosis, addresses it at the tap.
What we recommend on City of Manassas water
A softener and carbon system sized from the current city report, plus under-sink reverse osmosis.
Figures checked September 2026 against City of Manassas. Utilities update reports annually; if you see a newer figure, tell us and we will update this page.
Areas on City of Manassas water
Pricing for City of Manassas homes
Prices include equipment, a licensed plumber's installation and startup for a standard install. If anything about your home changes the price, you hear it before we book the plumber, not after.
Whole-Home + Drinking Water
The complete package for a municipal-water home.
$2,499installed
- Metered whole-home softener
- Catalytic carbon for chloramine and chlorine
- Sediment pre-filter and bypass
- 5-stage under-sink reverse osmosis with faucet
- Licensed installation, startup and salt
Whole-Home Only
Soft, chlorine-free water at every tap and shower.
$1,899installed
- Metered whole-home softener
- Catalytic carbon media
- Sediment pre-filter and bypass
- Licensed installation, startup and salt
- Add reverse osmosis any time
Reverse Osmosis Only
Clean drinking water for condos and kitchens.
$799installed
- 5-stage NSF/ANSI 58 system
- Removes lead, PFAS and dissolved solids
- Dedicated lead-free faucet
- Optional fridge and ice line
- Licensed installation and first filters
Standard install covers
- Main water line, a drain and an outlet within reach in a basement, garage or utility room
- Kitchen sink with cabinet space for the reverse osmosis unit
- Copper or PEX supply lines in serviceable condition
- Permit where your jurisdiction requires one
Quoted before we book
- Long plumbing runs to reach the main line, or adding a drain or outlet
- Crawlspace or exterior installs, and galvanized pipe that needs replacing
- Private wells: lab test first, then a system designed to the results
- Fridge and ice maker line for the reverse osmosis unit