How Source Type and Sampling Depth Influence Expected 1,2,3-TCP Levels

Surface water as the supply source

Elmendorf Air Force Base's public water system uses surface water, which differs from groundwater in characteristics affecting 1,2,3-trichloropropane presence and variability.

Sampling in distribution system versus individual homes

EPA’s reported data derive from public system samples, not private household taps, so they reflect the distribution network rather than localized plumbing conditions.

Sample depth standardization

The system’s monitoring follows federal protocols with samples taken at points standardized for regulatory consistency, which may not capture variations due to household-specific plumbing setups or point-of-use differences.

Typical Pathways of 1,2,3-TCP Entry into Water in Anchorage Municipality

Industrial and agricultural source contributions

1,2,3-TCP commonly originates from historical pesticide use and chemical manufacturing byproducts which can migrate into surface water through runoff.

Distribution system factors

Although surface water is treated before distribution, trace amounts may enter or persist in the system without indicating contamination at the consumer’s tap.

Understanding Differences Between Public System Records and Private Well Testing

Scope of EPA monitoring data

EPA SDWIS monitoring data represent aggregated system-level information for the Elmendorf AFB public water system, not individual private wells or homes.

Need for household-specific testing

To determine 1,2,3-TCP presence in your own household’s water, a specific water sample tested by a qualified laboratory is necessary since system data cannot substitute for home-level assessments.

No health-based exceedances recorded

The system’s official record shows zero health-based violations for 1,2,3-TCP, indicating compliance with federal health guidelines at the system level through 2015.

Information to Collect Before Considering Additional Treatment

Current treatment capacity and performance

Note how your existing equipment functions and areas where it may not fully address 1,2,3-TCP or other concerns.

Household water usage patterns

Record typical daily water volume to estimate treatment system capacity needs should you pursue additional options.

Water test results from a certified laboratory

Obtain detailed water analysis focused on 1,2,3-TCP to inform decisions using data specific to your home.

Expected Changes in Tap Water After Using the C-Series 1,2,3-TCP Filter

Reduction of 1,2,3-TCP levels

The C-Series 1,2,3-TCP Filter is designed to reduce 1,2,3-trichloropropane in household water, potentially improving taste and removing trace organic compounds.

Operational readiness

This equipment ships ready to configure with your home water system and does not require specialized setup services.

Scope of Data and Implications of Sample Size and Well Count

Number of samples and monitoring period

Eight samples were collected across the Elmendorf AFB distribution system between late 2014 and mid-2015, representing data for that specific timeframe and system.

Significance of results

No detections above the reporting level (0.03 µg/L) were recorded; however, the relatively small number of samples means this dataset characterizes system-level trends rather than comprehensive variations.

What You Should Not Infer From Area System Data

Do not conclude your household water is free of 1,2,3-TCP without testing

System monitoring data cannot confirm your home's water quality since differences arise from plumbing, point-of-use conditions, or private sources.

Do not interpret zero detection in system samples as regulatory assurance of zero risk

The absence of detection within this dataset reflects low system-level measurements and not an absolute guarantee of absence in all circumstances.

Do not assume existing equipment’s limitations reflect the system's water quality

Equipment performance depends on capacity and design; system data alone do not define treatment equipment adequacy for your household.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2015-06-29. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for USAF Elmendorf AFB (AK2211423), AK: 8 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level