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

By SubcontractorHub Editorial Team·Published October 2026

A herbicide panel can list several names that share a runoff sentence, and the digit next to endothall is not the digit next to diquat. Diquat prints 0.02 on both cells and a cataract health cell, while the source cell uses the same short herbicide-runoff line. 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.

Diquat, at 0.02 mg/L with a cataract cell, is the row people borrow when the source sentence matches: diquat in well water. Glyphosate, at 0.7 mg/L, uses a herbicide-runoff source cell and a kidney-and-reproductive health cell: glyphosate in well water. Endrin, at 0.002 mg/L with a liver cell, is a banned-insecticide row, not this herbicide line: chlordane in well water already separates that 0.002 from a termiticide.

The 0.1 Line Is Not Diquat's 0.02

EPA's national primary table, fetched the day this page was written, lists endothall with an MCLG of 0.1 mg/L and an MCL of 0.1 mg/L. The potential-effects cell says stomach and intestinal problems. The source cell says runoff from herbicide use. 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.

Diquat, on that same table, prints 0.02 mg/L in both the goal cell and the MCL cell. Its health cell says cataracts. Its source cell also says runoff from herbicide use. Sharing the source sentence is not sharing the digit, and sharing the word herbicide is not sharing the health cell. A stomach sentence is not a cataract sentence. Quoting a bare herbicide-runoff line without the name lets the next reader pick diquat, or pick glyphosate at 0.7 mg/L, which uses a kidney-and-reproductive health cell and the same short source pattern.

Endrin, on that same table, prints 0.002 mg/L on both cells. Its health cell says liver problems. Its source cell says residue of a banned insecticide. Sharing a pesticide panel is not sharing this herbicide 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. Do not write the public MCL as if the well were a public system.

What the Endothall 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 diquat sentence, or endrin's 0.002, from landing on a stomach-and-intestinal row that said 0.1.

No Removal Percent Is Printed Here

The national page says an MCL is the highest level of a contaminant allowed in drinking water, set as close to the goal as feasible using the best available treatment technology and taking cost into consideration. An MCLG is the level below which there is no known or expected risk to health. MCLGs are non-enforceable public health goals. Those sentences define the two cells. They are not a percent a cartridge will remove, and they are 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 Endothall in Well Water Note Say?

Five lines keep the next visit from borrowing diquat, or from writing a removal claim the table did not print. Name the contaminant the lab printed, show both cells, and keep 0.1 from sliding into 0.01 or 0.02.

1. The contaminant name as the lab printed it, and not diquat and not endrin.
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 endothall 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 diquat's 0.02 or endrin's 0.002.

Where the Row Sits on the Job

Endothall 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 0.1 line into a carbon quote because the panel listed several herbicides skips the name and skips the fact that diquat is a different digit on a similar source sentence.

The health cell on the fetched table is stomach and intestinal 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.

Both cells print 0.1 mg/L. That match is what the table printed. It is not a promise that the lab result was 0.1, and it is not a promise that a private well has no endothall. Write both cells anyway. Dropping the goal because it matches the MCL is how a later reader treats 0.1 as if it were only an enforceable number with no goal, or as if it were diquat's cataract row.

A short herbicide-runoff sentence is easy to reuse. Glyphosate's source cell is also a herbicide-runoff line, and its digits are 0.7, not 0.1. Endrin's source cell is a banned insecticide, and its digits are 0.002. If the lab names endothall, keep the stomach-and-intestinal cell attached. Do not average it with a cataract row or a liver row because all three 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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