Rockland County Private Well Testing Law (PWT) Analysis

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Rockland County Private Well Testing Law (PWT) Required Testing Parameters and Maximum Contaminant Levels

Volatile Organic Compounds1 Standard Units MCL* Guideline or Optimal Range
  • Benzene
  • Bromobenzene
  • Bromochloromethane
  • Bromomethane
  • N-Butylbenzene
  • Sec-Butylbenzene
  • Tert-Butylbenzene
  • Carbon Tetrachloride
  • Chlorobenzene
  • Chloroethane
  • Chloromethane
  • 2-Chlorotoluene
  • 4-Chlorotoluene
  • Dibromomethane
  • 1,2-Dichlorobenzene
  • 1,3- Dichlorobenzene
  • 1,4- Dichlorobenzene
  • Dichlorodifluoromethane
  • 1,1-Dichloroethane
  • 1,2-Dichloroethane
  • 1,1-Dichloroethene
  • cis-1,2-Dichloroethene
  • trans-1,2-Dichloroethene
  • 1,2-Dichloropropane
  • 1,3-Dichloropropane
  • 2,2-Dichloropropane
  • 1,1-Dichloropropene
  • cis-1,3-Dichloropropene
  • trans-1,3-Dichloropropene
  • Ethylbenzene
  • Isopropylbenzene
  • p-Isopropyltoluene
  • Methylene Chloride
  • n-Propylbenzene
  • Styrene
  • 1,1,1,2-Tetrachloroethane
  • 1,1,2,2-Tetrachloroethane
  • Tetrachloroethene
  • Toluene
  • 1,2,3-Trichlorobenzene
  • 1,2,4-Trichlorobenzene
  • 1,1,1-Trichloroethane
  • 1,1,2-Trichloroethan
  • Trichloroethene
  • Trichlorofluoromethane
  • 1,2,3-Trichloropropane
  • 1,2,4-Trimethylbenzene
  • 1,3,5-Trimethylbenzene
  • m-Xylene
  • o-Xylene
  • p-Xylene
  • methyl-tertiary-butyl-ether
  • Vinyl Chloride
 5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
10
2		 ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
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ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
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ug/L
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ug/L
ug/L
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ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
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ug/L
ug/L
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ug/L
ug/L
ug/L
ug/L
ug/L
ug/L		 MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL
MCL

Inorganic Compounds
  • Arsenic
  • Nitrates
  • Chloride
 0.01
10
250		 mg/L
mg/L
mg/L		 MCL
MCL
MCL

Microbiological Parameters
  • Total Coliform
  • E-Coli or Fecal Coliform2
 zero
zero		 presence/absence
presence/absence		 MCL
MCL

Secondary Parameters
  • pH
  • Iron
  • Manganese
  • Sodium
 6.5 to 8.5
0.3
0.3
No designated limits3		 unitless
mg/L
mg/L
mg/L		 Optimal Range
Guideline
Guideline
Guideline
Notes
1VOCs from NYSDOH Subpart 5-1 Table 9D (POCs) plus MTBE, Vinyl Chloride.
2Analysis for either E-coli or Fecal Coliform is required if Total Coliform is present.
3Water containing more than 270 mg/L sodium should not be used for drinking by persons on moderately sodium restricted diets.
*”Maximum contaminant level” or “MCL” means the maximum permissible level of a contaminant in drinking water, as specified in 10 NYCRR Part 5, Subpart 5-1.