Appendix 75-C., Appendices, TITLE 10. Department of Health, New York Codes Rules Regulations

New York Codes Rules Regulations (Last Updated: March 27,2024)

TITLE 10. Department of Health

Appendices

Appendix 75-C.

INDIVIDUAL ONSITE WATER SUPPLY SYSTEMS—STATEWIDE WATER QUALITY STANDARDS

(Statutory authority: Public Health Law, § 201[1][1])

Historical Note

Appendix filed March 1, 2016 eff. March 16, 2016.

TABLE 1

The standards in Table 1 shall not be exceeded:

Contaminant	Standard (1)
Coliform Bacteria	Any positive result (2)
Lead	0.015 mg/l
Nitrates	10 mg/l as Nitrogen
Nitrites	1 mg/l as Nitrogen
Turbidity	5 NTU (3)
Arsenic	0.010 mg/l

(1) mg/l means milligrams per liter (parts per million).

(2) A positive result means that coliform bacteria are present; a negative result means that coliform bacteria are absent or are not present.

(3) NTU means Nephelometric Turbidity Units.

TABLE 2

Exceeding the following standards may necessitate: (1) installation and maintenance of water treatment devices; or (2) limited daily consumption of water by certain persons:

Contaminant	Standard (1)
Iron	0.3 mg/l (2)
Manganese	0.3 mg/l (2)
Iron plus manganese	0.5 mg/l (2)
Hardness	150 mg/l as CaCO₃ (2)
Alkalinity	100 mg/l as CaCO₃ (2)
pH	6.5 – 8.5 (3)
Sodium	No designated limit (4)

(1) mg/l means milligrams per liter (parts per million).

(2) If standards are exceeded options for treatment should be evaluated.

(3) If pH values are outside of this range (i.e., less than 6.5 or greater than 8.5) options for treatment should be evaluated.

(4) Water containing more than 20 mg/l of sodium should not be used for drinking by people on severely restricted sodium diets. Water containing more than 270 mg/l of sodium should not be used for drinking by people on moderately restricted sodium diets.