Chlorobenzene in Well Water: The Public 0.1 mg/L Line

By SubcontractorHub Editorial Team·Published October 2026

A volatile panel can list several names that share a factory sentence. The digit next to chlorobenzene is not unique. Styrene prints 0.1, and trans-1,2-dichloroethylene prints 0.1, on the same national table. Dealers who sell treatment still have to say which public line they are reading. SubcontractorHub is software for the customer record. This page is the row. It is not a treatment design, and it is not medical advice.

Styrene, at the same 0.1 mg/L with a circulatory phrase in the health cell, already has its own page: styrene in well water. Benzene, at 0.005 mg/L, is benzene in well water. Chlorobenzene in well water is only this chemical.

The 0.1 Line Is Not Styrene

EPA's national primary table, fetched the day this page was written, lists chlorobenzene with an MCLG of 0.1 mg/L and an MCL of 0.1 mg/L. The potential-effects cell says liver or kidney problems. The source cell says discharge from chemical and agricultural chemical factories. Footnote 2 says units are milligrams per liter unless otherwise noted, and that milligrams per liter are equivalent to parts per million. This row did not opt out of that unit.

Styrene, on that same table, prints 0.1 mg/L in both the goal cell and the MCL cell. Its health cell says liver, kidney, or circulatory system problems. Its source cell says discharge from rubber and plastic factories, and leaching from landfills. Sharing the digits is not sharing the chemical. Quoting a bare 0.1 without the name lets the next reader pick the landfill sentence.

Trans-1,2-dichloroethylene, on that same table, also prints 0.1 mg/L in both cells. Its health cell says liver problems. Its source cell says discharge from industrial chemical factories. A shorter health cell is not this row. The opening sentence of the national page says these standards apply to public water systems. It does not name a single-home well. If the jug on the counter is a private well, say so.

What the Chlorobenzene in Well Water Note Holds

The table above is the note. It is not a quote, and it is not a removal design. A customer who wants a price still needs a test, a model, and a scope. Those live on the job. This page only stops the styrene sentence, or the shorter liver sentence, from landing on a row that named chemical and agricultural chemical factories.

No Removal Percent Is Printed Here

Footnote 1 says an MCL is set as close to the goal as feasible using the best available treatment technology and taking cost into consideration. That sentence is a definition of how an MCL is set. It is not a percent a cartridge will remove, and it is not a price. The technology table was not fetched for this row on this date, so this page does not invent an X.

How a mark on that table differs from a treatment technique is what best available technology means. If you sell carbon, say you sell carbon. Do not say a mark you did not fetch is a guarantee on this well. No removal percentage was fetched for this row, so none is printed. No installed price was fetched, so none is printed. No CAS number was fetched for this row on this date, so none is printed.

What Should the Chlorobenzene in Well Water Note Say?

Five lines keep the next visit from borrowing styrene, or from writing a removal claim the table did not print. Name the contaminant the lab printed, show both the goal and the MCL, and say whether the jug is a private well.

1. The contaminant name as the lab printed it, and not styrene and not trans-1,2-dichloroethylene.
2. The result and the unit. If the unit is not milligrams per liter, do not drop the unit and call the result 0.1.
3. The public pair you compared it with: MCLG 0.1 mg/L and MCL 0.1 mg/L, named as the national chlorobenzene row.
4. Whether the sample is a private well or a public system. The national page names public water systems. It does not name a single house.
5. What you did not claim: no removal percent, no installed price, no CAS, and no statement that 0.1 mg/L is styrene's landfill row.

Where the Row Sits on the Job

The lab sheet belongs with the customer, the address, and the date of the sample. A price for equipment is a later page, after someone has read this row and the rows next to it. Mixing the 0.1 line into a carbon quote because the panel listed several organics skips the name.

The health cell on the fetched table is liver or kidney problems, described as a potential effect of long-term exposure above the MCL. That sentence is the public table's cell. It is not a finding about the household, and it is not a reason to add a medical claim the lab did not print. If a customer asks what the number means for a person, the honest line is that this page is not medical advice.

A small volume on a dosing note is a different conversion. Fluid ounces stated as milliliters, using 29.57353, stay on fluid ounces to milliliters. That factor is not a chlorobenzene result.

How a dealer reads a full panel is the well water testing guide. The difference between a goal and an enforceable level is MCL and MCLG. The software that holds the customer file is water treatment contractor software. This article does not size a filter and does not tell a household the water is safe to drink.

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