Water treatment in Littleton, tested at the tap

For most of Littleton the tap water is municipal, tested, and treated — but that is not the same as being right for your house. The bulk of the city is served by the Littleton Water and Sanitation District, which purchases treated Denver Water surface supply and distributes it across the South Platte valley and the foothills. Denver Water publishes an annual Water Quality Report; Littleton Water and Sanitation adds its own Consumer Confidence Report. A small share of larger-lot homes on the western foothills edge and the southern acreage draw from private wells. The only way to know what is at your tap is a real on-site test.

On the Littleton Water and Sanitation side, the list starts with hardness from the Denver Water supply, plus chlorine residual and disinfection byproducts — haloacetic acids (HAA5), total trihalomethanes, bromodichloromethane, and chloroform. Denver Water's report also surfaces radium, arsenic, and trichloroacetic acid. Inside the older neighborhoods — the historic Main Street corridor, Louthan Heights with 1920s homes, and the 1950s–60s in-fill pockets — lead and copper show up at the tap from pre-1986 solder and brass fixtures. On private wells along the western foothills edge and the southern acreage, the profile shifts to iron and manganese as staining, arsenic from foothills alluvial material, nitrates and coliform after rain, and occasional VOCs near septic systems.

For homes on the Littleton Water and Sanitation system, test annually for hardness, chlorine residual, pH, total dissolved solids, and lead and copper — especially in older neighborhoods like the Main Street corridor, Louthan Heights, Bowmar, or Columbine. For private wells on the western foothills edge or the southern acreage, test annually for coliform, nitrates, arsenic, iron, and manganese. Test again after any major storm or spring runoff, after work on the well or plumbing, and after remodeling in a pre-1980 home. Once a year is the minimum — more often if your source or plumbing changes.

Most do. Littleton Water and Sanitation draws from the Denver Water blend, and the supply carries meaningful hardness — about 96.6 mg/L (5.7 gpg), moderately hard on the USGS scale. Inside many homes the working hardness climbs above that because of mineral pickup in older service lines and long distribution runs to the foothills-edge neighborhoods. You'll see it as spotting on glassware, scale on faucets and shower glass, and wear on water heaters and dishwashers. On private wells along the western foothills edge, the hardness often climbs higher because the foothills alluvial material adds more calcium and magnesium. A properly sized ion-exchange softener removes the minerals that drive the damage. Salt-free conditioners help scale cling less but do not remove the minerals, and on Littleton water the difference shows up fast.

Yes. Our Denver Metro office at (303) 248-3390 covers Littleton and the south-metro communities along the South Platte and the Santa Fe Drive corridor — Englewood, Centennial, Highlands Ranch, Denver, and the unincorporated Jefferson County foothill homes just west of the city limits — with scheduled routes year-round. On-site testing, softener and RO installs, and iron-and-manganese filtration on western foothills wells are routine for that crew. Statewide dispatch out of our four regional offices covers the rest of Colorado.