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

By SubcontractorHub Editorial Team·Published October 2026

A herbicide panel can list several names that share a row-crop runoff sentence. The digit next to alachlor is not the digit next to atrazine, and it is not safe to borrow chlordane's 0.002 because that chemical is a termiticide. 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 Atrazine's 0.003

EPA's national primary table, fetched the day this page was written, lists alachlor with an MCLG of zero and an MCL of 0.002 mg/L. The potential-effects cell says eye, liver, kidney or spleen problems, anemia, and an increased risk of cancer. The source cell says runoff from herbicide used on row crops. 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.

Atrazine, on that same table, prints 0.003 mg/L in both the goal cell and the MCL cell. Its health cell says cardiovascular system or reproductive problems. Its source cell uses the same row-crop runoff sentence. Sharing the source words is not sharing the digit. That row has its own page, atrazine in well water.

2,4-D, on that same table, prints 0.07 mg/L on both cells and the same row-crop source sentence. Its page is 2,4-D in well water. Chlordane prints an MCL of 0.002 mg/L with a goal of zero, but the source cell says residue of a banned termiticide. Endrin also prints 0.002 on both cells, with liver problems and a banned-insecticide source. 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 Alachlor in Well Water Note Holds

The goal cell is zero. The page defines an MCLG as the level 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. Zero on this row is that kind of goal. It is not a lab result of zero, and it is not a statement that the well has no alachlor.

The MCL cell is 0.002 mg/L. The page defines an MCL as the highest level allowed in drinking water, set as close to the MCLG as feasible using the best available treatment technology and taking cost into consideration. 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 names the eye, the liver, the kidney, and the spleen, plus anemia and an increased risk of cancer. Those words are the public table's potential-effects cell for long-term exposure above the MCL. They are 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.

The source cell is runoff from herbicide used on row crops. Keep that sentence on alachlor. Do not shorten it to "herbicide runoff" and let the next reader pick simazine, which the same table lists at 0.004 mg/L with a source cell that says herbicide runoff and a health cell that says problems with blood. The difference between a goal and an enforceable level is MCL and MCLG.

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 atrazine's 0.003, or chlordane's termiticide sentence, from landing on a row-crop row that said 0.002.

Best available technology, when a page names a mark, is explained in what is best available technology. No mark was fetched for alachlor on this date, so none is printed. A carbon sentence copied from a neighbor is not this row.

What Should the Alachlor in Well Water Note Say?

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

1. The contaminant name as the lab printed it, and not atrazine and not chlordane.
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 alachlor 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 atrazine's 0.003 or 2,4-D's 0.07.

Where the Row Sits on the Job

Alachlor 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 herbicides skips the name and skips the fact that atrazine is a different digit on the same source sentence.

The spleen and the anemia words are specific to this health cell on the fetched table. Atrazine does not use them. Chlordane does not use them. If the lab names alachlor, keep those words attached. Do not replace them with a cardiovascular sentence because both chemicals can show up on a crop-herbicide panel.

Zero and 0.002 are not the same kind of number. The goal is non-enforceable. The MCL is the enforceable standard. Write both. Dropping the goal because it is zero is how a later reader treats 0.002 as if chlordane and alachlor were one chemical.

How a dealer reads a full panel, including which tests were actually run, is the well water testing guide. A neighboring insecticide row at 0.2 mg/L is oxamyl in well water. 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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