Fleck Total Well Chlorination System

Buy Now

View full details

How Seasonal and Multi-Year Variation Shows in the Record

Sampling Dates and Range

Groundwater data from Los Angeles County aquifers, sampled between March 2011 and February 2025, show chloride concentrations across 231 results from 179 wells. These results span over a decade, reflecting various seasonal and multi-year changes in aquifer water composition.

Detection Frequency

Chloride was detected in 223 of the 231 samples, indicating its regular presence in the groundwater at various levels, while 8 samples were below the reporting threshold, demonstrating natural fluctuations in measurements over time.

How to Compare This Area’s Record With a Neighboring County’s Without Overreading It

Independent Aquifer Characteristics

Los Angeles County aquifers have unique hydrogeological features and land uses that influence groundwater composition. Comparing to neighboring counties requires attention to these differences rather than assuming identical water quality or treatment needs.

Range Versus Typical Values

The wide chloride range, from 0.83 to 18,200 mg/L, highlights localized conditions rather than a uniform profile. Neighboring counties may have different ranges and medians, so understanding local variability is key before drawing conclusions about your water.

How the Constituent Enters Groundwater or the Distribution System in This Region

Natural and Man-Made Sources

Chloride reaches groundwater in Los Angeles County through several pathways, including natural mineral dissolution, irrigation return flows, and urban runoff. These sources contribute to the detected concentrations observed in monitoring wells of varying depths.

Effect of Well Depth

Samples come from wells ranging 6 to 3,945 feet deep, showing that chloride presence can vary with depth, reflecting different underground layers and influences on water chemistry.

What the Measured Range Means Against the Relevant Federal Standard, and What It Does Not Mean

Aesthetic Secondary Standard Context

Forty-four samples exceeded the EPA secondary standard for chloride (250 mg/L), a guideline focused on taste and staining. This exceedance does not imply health risk or violation, but rather indicates potential aesthetic effects.

Limitations of the Data for Individual Wells

These measurements represent regional sampling results and do not define the chloride level in any single well, including your own. Only a direct, certified laboratory test of your water can determine its specific content.

What a Certified Laboratory Test for This Constituent Reports and How to Read It

Test Report Features

A certified test report details the chloride concentration found in your water sample, alongside reporting limits and detection confirmations. Interpret this result considering the EPA secondary standard to understand its aesthetic impact.

Interpreting Your Results

Chloride values below 250 mg/L typically indicate no notable taste or staining issues; values above may necessitate treatment options. Confirming your water’s chloride level helps decide the best approach for management.

Recommended Step: To definitively assess your well’s total water condition, order a certified chloride laboratory test for your household supply. If chloride concentration aligns with or exceeds aesthetic thresholds, the Fleck Total Well Chlorination System, rated for 32,000 grain capacity, ships ready to configure as a documented solution for maintaining water quality under increased demand.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2025-02-24. These figures describe groundwater sampled in this area. They are not a test of any individual private well - only a test of that well can establish its own water.

On record: U.S. Geological Survey sampling of Chloride in the aquifer (Los Angeles County): 231 results from 179 wells, median 65.6 mg/L, range 0.83-18200.0 mg/L; 44 above an AESTHETIC secondary standard only (secondary standard 250.0 mg/L (aesthetic)) - not a health finding