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for laundering, plumbing, and showering.

MCLs have not been developed for

secondary

parameters,

but

instead

the

NJDEP

has

adopted

“recommended

upper

limits.” Testing for secondary recommended to make the well

parameters is used to determine if any treatment water aesthetically pleasing to the consumer.

is

Figure E1: Statewide Summary of Private Well Testing Act Results For Primary Drinking Water Standards September 2002 – April 2007 (Of 51,028 wells)

A total of 32,530 (64%) of the 51,028 wells tested exceeded one or more of the recommended upper limits for secondary parameters. Due to the nature of soils and geology, the ground water in the southern part of the state tends to be acidic (pH below

7), while ground water in the northern part tends to be neutral (pH = 7) to basic

above 7). Of the recommended range

wells tested, of 6.5 to 8.5.

22,699 wells (45%) had pH values outside Both iron and manganese are inorganic ions

(pH the that

occur naturally in soils and rocks throughout the state. A total reported iron levels above the recommended upper limit of 0.3 (19%) were above the recommended upper limit of 0.05 mg/l Figure E2).

of 14,751 (29%) mg/l, and 9,890 for manganese.

wells wells (See

ix

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