Noticing a slight chemical taste or unusual staining on fixtures in your Tulare County home, you wonder if 1,2,3-TCP—the chlorinated solvent once used in soil fumigation—is involved. The public water system supplying Visalia and nearby areas serves nearly 150,000 people via groundwater. Here’s a technical checklist to help you navigate the data and treatment options.
How California's 5 ng/L State Limit Compares with the Absence of a Federal MCL
California's public health goal sets 1,2,3-TCP at 0.005 micrograms per liter (µg/L), or 5 parts per trillion (ppt), while EPA has not established a maximum contaminant level.
Federal Unregulated Contaminant Monitoring Rule data (2013–2016) for CA Water Service - Visalia found 1,2,3-TCP detections up to 0.052 µg/L (52 ppt) in groundwater-supplied drinking water.
A detection above the reporting level (0.03 µg/L) indicates presence but is not a violation or a stated safety concern by EPA, since no federal MCL exists for this chemical.
The state’s much lower notification level signals a consumer preference standard, not a federally enforceable health limit.
The Agricultural Land-Use History of the Region and How It Maps onto Detections
Tulare County has a legacy of soil fumigant use from mid-20th century agriculture, which can explain trace 1,2,3-trichloropropane in groundwater decades later.
This historic use aligns with where monitoring found the chlorinated solvent in public water system wells serving households.
Groundwater’s slow flow means chlorinated solvent residues may persist without fresh source input.
The Household or Facility Symptoms That Do and Do Not Point to This Problem
Unusual taste or slight discoloration at faucets may prompt a concern about 1,2,3-TCP but are not diagnostic on their own.
Standard household symptoms like staining from iron or hardness are unrelated to 1,2,3-TCP.
Visual or smell clues alone cannot confirm presence; laboratory testing of your specific water sample is required to measure 1,2,3-trichloropropane there.
Maintenance Rhythm of the Documented Technology in Plain Terms
The Fleck 1,2,3-TCP Filter ships ready to configure and complements household plumbing to address chlorinated solvent traces.
Filter media replacement schedules depend on individual household demand and local water quality but typically entail routine monitoring and periodic media exchange.
Operating the filter with scheduled media changes helps maintain effectiveness without complex system downtime.
How Sample Depth, Well Depth or Source Type Changes What a Reader Should Expect
Groundwater wells vary in depth, affecting detections: deeper wells often show different contaminant profiles than shallow ones.
Municipal groundwater sources may include blending or treatment steps not reflected in raw well sampling results.
The 86 samples in the federal database represent the public water system’s composite data, not a single household’s source water profile.
Choosing between available technical approaches for 1,2,3-trichloropropane treatment in Tulare County starts with confirmed water analysis. When the chlorinated solvent is present near the low parts-per-trillion range documented for the area, the Fleck 1,2,3-TCP Filter offers a tested option that ships ready to configure to meet household demand. Its performance aligns with the concentrations noted in government monitoring, providing a practical step toward addressing your water quality concerns.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2016-01-12. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for CA Water Service - Visalia (CA5410016), CA: 86 results across 1 listed contaminants, 6 detections above the reporting level; no federal MCL
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