Your home’s water can have quality problems that affect health, taste, plumbing, and appliances — and many of those problems show up as signs you can observe without any testing equipment. Common indicators include discolored water, unusual odors, scale buildup on fixtures, staining in sinks and tubs, and changes in taste or clarity. If you’re noticing any of these in your Denver-area home, a water quality test is the right next step.

Discolored Water

Water that runs brown, orange, or reddish is typically carrying iron — either from corroding iron pipes in your home or from the municipal supply. In older Denver neighborhoods with galvanized steel or cast iron supply lines, this is a known issue. The discoloration is often most pronounced after the water has sat in the pipes overnight and clears after running the tap for a minute, but that doesn’t mean the water is safe — it means dissolved iron is present.

Blue or green tinting in water, or greenish staining around copper fittings and drains, can indicate copper corrosion — often caused by water that is too acidic. This is worth taking seriously, as elevated copper levels in drinking water can be a health concern over time.

Odors That Don’t Belong

A rotten egg smell in your hot water is almost always hydrogen sulfide — often produced by a reaction between the anode rod in your water heater and naturally occurring sulfur in the water. Switching to a magnesium anode rod or flushing the tank may reduce it, but the underlying sulfur content is worth testing. A chlorine or bleach smell indicates high disinfectant levels from the municipal supply, which can typically be addressed with a carbon filtration system.

Earthy, musty, or fishy odors can indicate bacterial or algae contamination — particularly in homes on private well water, though municipal supply is not immune during certain seasons. These odors warrant testing immediately.

Scale Buildup and Mineral Staining

If white, chalky deposits accumulate quickly around faucet aerators, showerheads, and the base of fixtures, your water is hard — meaning it contains elevated levels of calcium and magnesium. Colorado’s Front Range is well-known for hard water, and the scale it leaves behind isn’t just a cleaning nuisance. It builds up inside pipes and appliances, reducing efficiency and shortening equipment life.

Reddish-brown or rust staining in toilet bowls, tubs, and sinks indicates iron or manganese content. Orange staining that appears in the toilet tank and bowl without visible rust in the pipes is often dissolved iron oxidizing on contact with air.

  • Brown, orange, or red water — iron or sediment in the supply
  • Blue-green tinting or staining — copper corrosion from acidic water
  • Rotten egg odor — hydrogen sulfide, often from the water heater
  • Heavy scale on fixtures and showerheads — hard water minerals
  • Rust staining in toilets, sinks, and tubs — dissolved iron or manganese
  • Cloudy or milky-looking water — sediment, air, or hardness

Taste Changes and Cloudy Appearance

Water that tastes metallic, salty, or just “off” compared to what you’re used to is worth investigating. Metallic taste often correlates with elevated metal content — iron, copper, or manganese. A salty taste can indicate high sodium levels, sometimes from a water softener that needs recalibrating. Cloudy or milky water that clears when left to stand is typically dissolved air — usually harmless — but cloudiness that persists may indicate suspended particles or high hardness levels.

Done’s team provides water quality testing and treatment solutions for Denver-area homes, including filtration, softening, and purification systems matched to what your specific water actually contains. Learn more on our water quality and treatment page, and explore the full range of plumbing services available for your home.