The MCLs and MCLGs for health-related regulated IOC contaminants shall be as listed in Table 704-1, below:

Table 704-1: IOC MCLs and MCLGs

IOC Contaminant

MCL

(mg/L unless otherwise specified)

MCLG

(mg/L unless otherwise specified)

Antimony

0.006

0.006

Arsenic through June 30, 2021

0.010

Zero

Arsenic as of July 1, 2021

0.0050

Zero

Asbestos

7 million fibers/L (longer than 10 μm)

7 million fibers/L (longer than 10 μm)

Barium

2

2

Beryllium

0.004

0.004

Cadmium

0.005

0.005

Chromium

0.1

0.1

Copper

See Env-Dw 704.03

1.3

Cyanide (as free Cyanide)

0.2

0.2

Fluoride (also see Env‑Dw 706)

4.0

4.0

Lead

See Env-Dw 704.03

Zero

Mercury

0.002

0.002

Nitrate (as N)

10

10

Nitrite (as N)

1

1

Total Nitrate + Nitrite

10

10

Selenium

0.05

0.05

Thallium

0.002

0.0005

Source. #9699, eff 5-1-10; ss by #12665, eff 1-1-19; ss by #13044, eff 5-28-20