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

By SubcontractorHub Editorial Team·Published November 2026

A pesticide panel can list several banned names on one page. The digit next to endrin is not safe to borrow just because chlordane prints 0.002 on the MCL, and it is not the digit next to heptachlor. 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.

The 0.002 Line Is Not a Zero Goal

EPA's national primary table, fetched the day this page was written, lists endrin with an MCLG of 0.002 mg/L and an MCL of 0.002 mg/L. The potential-effects cell says liver problems. The column header calls that a potential health effect from long-term exposure above the MCL, unless a row is specified as short-term. This row is not marked short-term. The source cell says residue of a banned insecticide. 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.

Both cells print 0.002. That is the point that gets lost when a neighbor's zero is pasted onto this name. Chlordane, on that same table, prints a goal of zero and an MCL of 0.002 mg/L. Its health cell says liver or nervous system problems and an increased risk of cancer. Its source cell says residue of a banned termiticide. Sharing 0.002 on the MCL is not sharing the goal, and sharing a banned-chemical sentence is not sharing the source word. Insecticide is not termiticide.

Heptachlor, on that same table, also says residue of a banned termiticide, and its MCL is 0.0004 mg/L with a goal of zero. That row has its own page, heptachlor in well water. Chlordane has its own page, chlordane in well water. The opening sentence of the national page says these standards apply to public water systems. It does not name a single-home well.

What the Endrin in Well Water Note Holds

The goal cell is 0.002 mg/L. The page defines an MCLG as the level of a contaminant in drinking water below which there is no known or expected risk to health. It says MCLGs allow for a margin of safety and are non-enforceable public health goals. On this row the goal is the same digit as the enforceable cell. It is not a lab result, and it is not a statement that the well has no endrin.

The MCL cell is also 0.002 mg/L. The page defines an MCL as the highest level of a contaminant that is allowed in drinking water. It says MCLs are set as close to MCLGs as feasible using the best available treatment technology and taking cost into consideration, and that MCLs are enforceable standards. That definition is the public rule's definition. It is not a price for a filter, and it is not a percent removed.

The health cell is liver 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 a person in the house. If a customer asks what the number means for a person, the honest line is that this page is not medical advice. Do not add a cancer sentence because chlordane has one. This row did not print one.

The source cell is residue of a banned insecticide. Keep that sentence on endrin. Do not shorten it to "banned chemical" and let the next reader pick chlordane, which is a termiticide, or heptachlor, which is also a termiticide at a shorter digit. The difference between a goal and an enforceable level is MCL and MCLG. On this row the two cells match. On chlordane they do not.

No Removal Percent Is Printed Here

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 chlordane's zero, or heptachlor's 0.0004, from landing on an insecticide row that said 0.002 on both cells.

Best available technology, when a page names a mark, is explained in what is best available technology. No mark was fetched for endrin on this date, so none is printed. A carbon sentence copied from a neighbor is not this row. A stomach-and-intestinal row at 0.1 mg/L is endothall in well water, and that page already warns not to borrow this 0.002.

What Should the Endrin in Well Water Note Say?

Five lines keep the public pair from being rewritten as a private-well fine or as a termiticide.

1. The contaminant name as the lab printed it, and not chlordane 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 0.002 mg/L and MCL 0.002 mg/L, named as the national endrin 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 chlordane's zero goal or heptachlor's 0.0004.

Where the Row Sits on the Job

Endrin in well water 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 names skips the name and skips the fact that the goal on this row is not zero.

Both the goal and the MCL have to stay on the note, even when they match. Dropping the goal because it repeats 0.002 is how a later reader pastes a zero from chlordane and calls the pages the same. Write both cells. Say they match. Do not say the match means the well passed.

A banned-insecticide sentence is easy to widen. Chlordane's source cell is a termiticide, and its goal is zero. Heptachlor's source cell is also a termiticide, and its MCL is 0.0004. If the lab names endrin, keep the matched 0.002 attached. Do not average it with 0.0004 because both names were banned.

How a dealer reads a full panel, including which tests were actually run, is the well water testing guide. 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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