Hickory Underground Water Conservation District #1

111 East Main Street * PO Box 1214

Brady, TX 76825

Ph. 325-597-2785

 

hickoryuwcd@yahoo.com

 

Iron Levels


View Larger Map

Click on the well and a popup will appear with information for that well.

The Constituent Values are in Ug/L. Beneath that is Mg/L.

Iron is considered a Secondary Contaminant. EPA has established National Secondary Drinking Water Regulations that set non-mandatory water quality standards for 15 contaminants. EPA does not enforce these "secondary maximum contaminant levels" or "SMCLs." They are established only as guidelines to assist public water systems in managing their drinking water for aesthetic considerations, such as taste, color and odor. These contaminants are not considered to present a risk to human health at the SMCL.

Table I. Secondary Maximum Contaminant Levels


 

 

 


Contaminant

Secondary MCL

Noticeable Effects above the Secondary MCL

Aluminum

0.05 to 0.2 mg/L*

colored water

Chloride

250 mg/L

salty taste

Color

15 color units

visible tint

Copper

1.0 mg/L

metallic taste; blue-green staining

Corrosivity

Non-corrosive

metallic taste; corroded pipes/ fixtures staining

Fluoride

2.0 mg/L

tooth discoloration

Foaming agents

0.5 mg/L

frothy, cloudy; bitter taste; odor

Iron

0.3 mg/L

rusty color; sediment; metallic taste; reddish or orange staining

Manganese

0.05 mg/L

black to brown color; black staining; bitter metallic taste

Odor

3 TON (threshold odor number)

"rotten-egg", musty or chemical smell

pH

6.5 - 8.5

low pH: bitter metallic taste; corrosion
high pH: slippery feel; soda taste; deposits

Silver

0.1 mg/L

skin discoloration; graying of the white part of the eye

Sulfate

250 mg/L

salty taste

Total Dissolved Solids (TDS)

500 mg/L

hardness; deposits; colored water; staining; salty taste

Zinc

5 mg/L

metallic taste

* mg/L is milligrams of substance per liter of water

Information taken from http://water.epa.gov/drink/contaminants/secondarystandards.cfm