If you see terms like 'detected', 'median', and 'range' in your water system's chlorine report
Government sampling records for the Highlands Ranch Water and Sanitation District in Douglas County show chlorine as a measured constituent in the public water system. Terms such as 'detected' indicate chlorine was measured by instruments during sampling events, but this does not mean there is a violation or unsafe condition. The 'median' value represents the middle concentration found across samples, while the 'range' covers the spectrum from lowest to highest detected amounts. These terms summarize data for the entire system, not for any single household's water supply. Individual water testing is necessary to know the actual chlorine level at your tap.
If you consider the difference between aesthetic secondary standards and health-based limits for chlorine
Chlorine in municipal water typically serves as a disinfectant to control microbial presence. While chlorine levels are monitored, the Environmental Protection Agency's record for this system shows zero health-based violations. Aesthetic secondary standards guide acceptable levels for taste and odor, which vary based on consumer preference and do not indicate health risks. Exceeding these secondary standards may lead to noticeable taste or smell but is not a safety finding. Understanding this distinction helps avoid unnecessary concern when chlorine is detected within normal operating ranges.
If you want to know how to reduce chlorine taste and smell in your household water
The Fleck Chlorine Taste & Smell Filter is designed to address chlorine’s sensory effects by using a specific filtration process that reduces its concentration at the point of use. This technology ships ready to configure for home connection and provides an effective method to improve water taste and odor while maintaining the disinfectant's benefits upstream in the distribution system. It is an option suited for households where existing treatment equipment no longer fully mitigates chlorine's presence.
If you notice certain fixtures or appliances seem affected by chlorine first
Fixtures and appliances most exposed to untreated water, such as kitchen faucets and ice makers, are often where chlorine’s taste and smell are first noticed. Because chlorine can volatilize when water is exposed to air, devices that store or dispense water under open conditions may show greater sensitivity to its presence. Addressing chlorine at the point of entry or near these fixtures can provide targeted improvement and reduce sensory irritation.
If you consider how your water source type affects chlorine levels and treatment expectations
This water system relies on surface water sources, which commonly require chlorination to maintain microbial safety throughout the distribution network. Surface water sources can have varying chlorine demand and seasonal fluctuations, influencing residual concentrations at delivery points. Understanding that chlorine presence is a typical aspect of surface water treatment aids in setting realistic expectations for treatment performance and maintenance of water quality.
Summary: This page explained how to interpret chlorine sampling terms found in Douglas County’s public water system record, clarified the difference between aesthetic taste-and-odor standards and health-based limits, described how the Fleck Chlorine Taste & Smell Filter effectively reduces chlorine sensory effects, identified household points most impacted by chlorine, and discussed how the surface water source influences chlorine levels. These insights can guide decisions about testing and managing chlorine in your home water supply.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2025-12-31. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA SDWIS record for HIGHLANDS RANCH WSD (CO0118015), surface water supply, serving 103444 people: 0 health-based violations of 4 total; lead 90th percentile 0.002 mg/L
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