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Author Topic: What does MCL stand for?  (Read 5848 times)

Offline Geezer

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What does MCL stand for?
« on: 10/06/2011 05:05:30 »
For some unknown reason I was elected to "Senior Executive Vice President in Charge of Water Sampling" for our community well.

Once a year, for equally unknown reasons, we have a water sample tested for the presence of nitrate. I did this quite recently, and the report came back indicating the sample contained 0.13 mg/L of the evil stuff. On the form there is a column adjacent to the result titled "MCL". Apparently this is the acceptable limit, and the MCL for nitrate seems to be 10 mg/L, so we seem to have squeaked past for another year.

At no place on the stinking form does it actually say what MCL stands for. It's obviously a TLA* known only to those skilled in the art.

I even looked here

http://ecfr.gpoaccess.gov/cgi/t/text/text-idx?c=ecfr&sid=bf36597e4e385db2d9765f011e7fb73f&rgn=div8&view=text&node=40:22.0.1.1.3.3.16.3&idno=40

to no avail. Anybody know?


*Three letter acronymn


 

Offline CliffordK

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What does MCL stand for?
« Reply #1 on: 10/06/2011 06:04:08 »
My guess is that you would not be talking about a minimum.

So...  a quick internet search suggested....

Maximum Concentration Level (or Limit)
Maximum Contaminant Level/Limit
« Last Edit: 10/06/2011 06:20:42 by CliffordK »
 

Offline Geezer

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What does MCL stand for?
« Reply #2 on: 11/06/2011 05:14:34 »
Yippee! "Maximum Contaminant Level" is correct.

http://water.epa.gov/drink/contaminants/#List

I will encourage the testing lab to add the definition to their @#$%^&* form.
 

Offline CliffordK

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What does MCL stand for?
« Reply #3 on: 11/06/2011 05:22:24 »
I hadn't thought much about nitrate in the well water.

Are you in an area exposed to significant amounts of agricultural runoff?

I suppose most other contaminants such as heavy metals don't change very much over the lifetime of the well.

The primary risk of NO3 is apparently with infants.
 

Offline Geezer

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What does MCL stand for?
« Reply #4 on: 11/06/2011 05:39:15 »
I hadn't thought much about nitrate in the well water.

Are you in an area exposed to significant amounts of agricultural runoff?

I suppose most other contaminants such as heavy metals don't change very much over the lifetime of the well.

The primary risk of NO3 is apparently with infants.

There is some agriculture in the area, but none within a one mile radius of our well. The only required tests for our little system are quarterly coliform, annual nitrate, and a nitrite test every nine years.

We are fortunate to have a plentiful supply of really excellent water, and because it's a small system, we don't have to alter it in any way. 
 

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What does MCL stand for?
« Reply #4 on: 11/06/2011 05:39:15 »

 

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