Chlordane in Well Water: The Public 0.002 mg/L Line

By SubcontractorHub Editorial Team·Published October 2026

A pesticide panel can list several names that share a banned-chemical sentence. The digit next to chlordane is not the digit next to heptachlor, and it is not safe to borrow because endrin prints the same 0.002 on the MCL. 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.

Heptachlor, also named as residue of a banned termiticide, already differs on the digits: its MCL is 0.0004 mg/L, not 0.002. Endrin, at an MCL of 0.002 mg/L, is a banned insecticide on the source cell, not a termiticide. Chlordane in well water is only this chemical. Atrazine, a row-crop herbicide at 0.003 mg/L, is a different source cell again: atrazine in well water.

The 0.002 Line Is Not Endrin's 0.002

EPA's national primary table, fetched the day this page was written, lists chlordane with an MCLG of zero and an MCL of 0.002 mg/L. The potential-effects cell says liver or nervous system problems and an increased risk of cancer. The source cell says residue of a banned termiticide. 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.

Endrin, on that same table, prints 0.002 mg/L in both the goal cell and the MCL cell. Its health cell says liver problems. Its source cell says residue of a banned insecticide. Sharing the MCL digits is not sharing the chemical, and sharing the word banned is not sharing the use. Quoting a bare 0.002 without the name lets the next reader pick the insecticide row, or pick alachlor, which also prints an MCL of 0.002 mg/L with a goal of zero and a source cell about herbicide runoff from row crops.

Heptachlor, on that same table, prints a goal of zero and an MCL of 0.0004 mg/L. Its source cell also says residue of a banned termiticide. Sharing that source sentence is not sharing the digit. 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. Do not write the public MCL as if the well were a public system.

What the Chlordane 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 endrin sentence, or heptachlor's 0.0004, from landing on a termiticide row that said 0.002.

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 that marks carbon, aeration, or oxidation 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 here. No installed price was fetched, so none is printed. No CAS number was fetched for this row on this date, so none is printed. Write the identifier the lab printed.

What Should the Chlordane in Well Water Note Say?

Five lines keep the next visit from borrowing endrin, 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 endrin and not heptachlor.
2. The result and the unit. If the unit is not milligrams per liter, do not drop the unit and call the result 0.002.
3. The public pair you compared it with: MCLG zero and MCL 0.002 mg/L, named as the national chlordane 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 0.002 mg/L is endrin's insecticide 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 0.002 line into a carbon quote because the panel listed several banned pesticides skips the name and skips the fact that endrin is a different source cell.

The health cell on the fetched table is liver or nervous system problems and an increased risk of cancer, 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 zero in the goal cell is the word the table printed. It is not a promise that the lab result was zero, and it is not a promise that a private well has no chlordane. The enforceable cell on that row is 0.002 mg/L. Write both cells. Dropping the goal because it says zero is how a later reader treats 0.002 as if it were the goal too, which is endrin's pattern, not this one.

Glyphosate, at 0.7 mg/L with a herbicide-runoff source cell, is a different organic row: glyphosate in well water. Do not average a termiticide residue with a herbicide runoff because both can show up on a long panel.

How a dealer reads a full panel, including which tests were actually run, 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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