Water treatment in Westminster

Westminster Water blends Denver Water treated surface supply with local Standley Lake water, then treats and disinfects the combined supply before distribution. The system meets every federal and state standard. What the plant tests and what your faucet delivers are two different things, though — chlorine residual is on by design, disinfection byproducts build up in the main overnight, and older homes in Walnut Creek, Harris Park, and the 1960s and 70s in-fill blocks along US 36 still run pre-1986 copper with lead solder that picks up trace metals between the main and the faucet. A real on-site test at your address is the only way to know what your tap delivers.

On the municipal side, Westminster Water reports on haloacetic acids (HAA5) and trihalomethanes — the disinfection byproducts of the chlorine residual — plus chromium, lead (typically from lead solder and brass fixtures in older homes rather than the source), and the chlorinated byproducts of surface-water disinfection. The Standley Lake blend runs slightly lower hardness than the city-average Denver Water core, but hardness and chlorine taste and odor still top the everyday list. On the western edges near the foothills transition where homes run on private wells, the list shifts to iron and manganese staining, occasional arsenic from the alluvial material, and coliform after heavy rain or spring runoff. A real on-site analysis covers both cases.

For homes on the Westminster Water supply, test at least once a year for hardness, chlorine residual, pH, TDS, lead and copper (especially pre-1986 homes), and any disinfection byproducts you want confirmed against the city's number. For homes on a private well on the western edges, test annually for coliform bacteria, nitrates, iron, manganese, and an arsenic check. Test again after a major storm or spring runoff pulse, after work on the well or plumbing, and after remodeling in a pre-1980 home where you disturbed solder. Once a year is the minimum — more often if your source or plumbing changes.

Most do. The Westminster Water blend carries about 100.0 mg/L (5.8 gpg) — moderately hard — and inside many homes the working hardness climbs above that because of mineral pickup in older copper service lines. You'll see spotting on glassware, scale on faucets and shower glass, and shortened lifespans for water heaters, dishwashers, washing machines, and ice makers. On the western edges where homes pull from private foothills wells, the working hardness can run considerably higher. A properly sized ion-exchange softener removes the calcium and magnesium that drive the damage. Salt-free conditioners help with scale but do not pull the hardness minerals out.

Yes. Our Denver Metro office at (303) 248-3390 covers Westminster and the inner-ring northwest along the US 36 and I-25 corridors — Arvada, Thornton, Northglenn, Broomfield, and Denver — with techs running scheduled routes year-round. On-site well testing, softener and RO installs, and filtration work on western-edge properties with private wells are routine for that crew. Statewide dispatch out of our four regional offices covers the rest of the Denver Metro region and beyond.

For most Westminster homes, yes. The Westminster Water supply meets federal and state standards at the plant, but chlorine residual, disinfection byproducts, trace metals from older plumbing, and the occasional radium reading are still present at the tap. A reverse osmosis system in your Westminster home pulls those down to drinking-water levels at the one tap your family drinks from. An under-sink RO unit with a carbon stage ahead of the membrane is the standard setup for municipal-supply homes. For western-edge well properties, RO also handles nitrates and any arsenic the well delivers.