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Local water facts · Virginia

City of Manassas: what’s in your tap water?

City of Manassas serves 42,500 people from Lake Manassas. The numbers below are from the utility’s own published testing, compiled by the EWG Tap Water Database (June 2026). The water is legal — the question is how it compares to health guidelines, which sit well below the legal limits.

Reviewed by Tyler Griffin — Founder, SwiftPro Heating, Cooling & Plumbing

11/ 100
Water ScoreHigh Risk
9contaminants above health guidelines
587×the top flag, vs. the health guideline
42,500people served

📄 Download City of Manassas’s one-page report — print it or share it (PDF) →

What the tests found

Each card shows how far a contaminant sits above its health guideline — the level scientists consider protective over a lifetime of drinking. A system can pass every legal test and still carry these levels.

Each bar starts at the health guideline and runs on a log scale — the faint ticks mark 10× and 100× over; the dark notch is the legal limit where one exists.

Health-effect labels and guideline levels above come from the EWG Tap Water Database (June 2026) — advisory benchmarks set by EWG’s researchers (methodology), not legal standards. The utility’s water meets federal legal limits.

What does 587× actually mean?

Think per glass: at 587× the guideline, one glass of tap water carries what 587 glasses would hold at the health-guideline level. The top flag here is Haloacetic acids (HAA9). Not an emergency — but worth knowing, because the fix is specific and usually simpler than people expect.

ZIP codes served by City of Manassas include 20108, 20109, 20110, 20111, 20112, 20113, 20114. Type yours on the free report page to see the version for your address.

Want it for your exact address? The free report matches your ZIP to this data, scores it, and shows which fix covers which flag — see your full free report. Reading tips: how to read a water report in 2 minutes.

How City of Manassas compares

Every system we track, plotted by Water Score — 0 to 100, higher is safer.

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City of Manassas scores 11/100 — ranking #44 of 58 tracked systems.

What actually fixes it

No single filter does everything — each option covers different flags, so the right answer depends on what’s in your water and how your house is set up. You’re weighing options, not grades of good.

Pitcher / carbon

Good on chlorine taste and some disinfection byproducts. Cartridges fade fast — about every 2 months.

Reverse Osmosis (RO)

The drinking-water workhorse: handles PFAS, nitrate, arsenic and most of the hard flags — at one tap. How Reverse Osmosis (RO) installation works →

Whole-home systems

Treats every tap and protects pipes and appliances — usually paired with Reverse Osmosis (RO) for the kitchen. What a softener fixes (and can’t) →

The full breakdown of what each option does and can’t do: the honest 60-second version · all the free guides.

See the report for your address

Type your ZIP, get the full picture free: every flag, what it means per glass, and which fix covers it. If you’d rather have a person look at it with you, the free in-home Home Water Checkup tests what no city report can see — your heater, pressure, and hardness.

Get my free water report Book a free Home Water Checkup

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📄 Get the printable one-page report (PDF) City of Manassas Water Score share card preview Grab the postable Water Score card →

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