Local Water System Overview
Larimer County's main public water system, operated by the City of Fort Collins, sources its water from surface supplies. This system serves approximately 179,901 people through 35,866 connections. Water treatment includes multiple processes documented under various EPA codes. Chloramine, a disinfectant used in municipal water treatment, is part of this system's water disinfection approach.
How Chloramine Enters the Distribution System in Larimer County
Use of Chloramine as a Disinfectant
Chloramine is intentionally added to the water during treatment to maintain disinfection as water travels through pipes. It is formed by combining chlorine and ammonia on purpose within the treatment facility to provide longer-lasting microbial control than chlorine alone.
Source and Treatment Process
The surface water serving this system undergoes multiple treatment processes before chloramine dosing, ensuring initial contaminant removal and safe distribution. The chloramine is introduced as part of the City of Fort Collins’ water treatment protocol to maintain water quality throughout the distribution network.
Seasonal and Multi-Year Variation in Chloramine Levels
Variation Over Time in Municipal Water
Municipal chloramine levels may vary seasonally or annually depending on treatment adjustments and water quality changes. Records from the system show treatment processes maintained over time but do not provide specific concentration data for chloramine itself. These fluctuations reflect operational practices rather than raw water changes.
Sampling Dates and Data Ranges
The system’s data records include various treatments with sampling extending through recent years, providing a backdrop for understanding water quality consistency. However, chloramine specifics are not individually measured in publicly released EPA compliance data, so residents should not assume their home water contains consistent chloramine levels based solely on general treatment descriptions.
Interpreting Chloramine Data and Sampling in Larimer County
Reading Water Quality Records as a Resident
Public water system records focus on overall safety and regulatory compliance, not specifically on chloramine concentration. Since chloramine is part of the disinfection process, it is expected to be present in some amount but is not classified as a contaminant requiring limit exceedance reporting. Residents needing precise data on chloramine in their tap water must conduct household-specific testing.
Number and Scope of Samples Behind Data
EPA records cover thousands of connections and samples collected under regulatory protocols. Yet, no direct measurements of chloramine concentration appear in public records, indicating that reported data represent system-wide treatment performance rather than specific chloramine levels at individual taps.
Water Changes After Using Fleck Chloramine (City Water) Filter
Effect on Chloramine at the Tap
The Fleck Chloramine (City Water) Filter is designed to reduce chloramine levels that remain in treated water once it reaches a home. This product ships ready to configure and uses proven technology to address chloramine, improving taste and water quality as experienced by household users.
Benefits Beyond Chloramine Removal
By reducing chloramine, this filter can also help minimize associated effects such as dry skin or potential pipe corrosion in plumbing. It supports household water quality without altering municipal treatment or violating regulatory standards.
Summary
Chloramine is introduced intentionally in Larimer County's surface water treatment to maintain disinfection through the distribution system. Public water records confirm treatment practices but do not detail chloramine levels, making direct home testing necessary for exact information. Using the Fleck Chloramine (City Water) Filter provides a documented solution to reduce chloramine at the residential tap, enhancing water quality after municipal treatment.
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 FT COLLINS CITY OF (CO0135291), surface water supply, serving 179901 people: 1 health-based violations of 15 total; lead 90th percentile 0.0028 mg/L
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