Encyclopedia of Environmental Science and Engineering, Volume I and II

WATER AND WASTE MANAGEMENT SYSTEMS IN SPACE 1245

TABLE 2

Water Quality Standards Comparison

QUALITY PARAMETERS Shuttle Potable EPA Current SSF Potable SSF Hygiene

PHYSICAL PARAMETERS ————

TOTAL SOLIDS (mg/L) 5 to 10 500 100 500

“COLOR, TRUE (Pt/Co units)” 15 15 15 15

CONDUCTIVITY Reference only — — —

TASTE (TTN) 3 — 3 N/A

ODOR (TON) 3 3 3 3

PARTICULATES

(max size—microns)

— — 40 40

pH Reference only 6.5–8.5 6.0–8.5 5.0–8.5

TURBIDITY (NTU) 11 1 1 1

DISSOLVED GAS (free @ 37°C) None at 1 AT — (see Note 1) N/A

FREE GAS (@ STP) — — (see Note 1) Note 1

INORGANIC CONSTITUENTS

(mg/L)(see Notes 2 and 5)

————

ALUMINUM — 0.05 — —

AMMONIA — — 0.5 05

ARSENIC — 0.05 0.01 0.01

BARIUM — 2 1 1

CADMIUM 0.01 0.01 0.005 0.005

CALCIUM — — 30 30

CHLORINE

(Total—Includes chloride)

— 250 200 200

CHROMIUM 0.05 0.1 0.05 0.05

COPPER 1.00 1 1.00 1.00

IODINE

(Total—Includes organic iodine)

Reference only — 15 15

IRON 0.3 0.3 0.3 0.3

LEAD 0.05 0.05 0.05 0.05

MAGNESIUM — — 50 50

MANGANESE 0.05 0.05 0.05 0.05

MERCURY 0.005 0.002 0.002 0.002

NICKEL 0.05 0.1 0.05 0.05

NITRATE (NO 3 -N) — 10 10 10

POTASSIUM 1 — 340 340

SELENIUM 0.01 0.05 0.01 0.01

SILVER 0.1 0.1 0.05 0.05

SULFATE — 250 250 250

SULFIDE — — 0.05 0.05

ZINC 5 5 5 5

BACTERICIDE (mg/L) ————

RESIDUAL IODINE

(minimum)

Reference only — 0.5 0.5

RESIDUAL IODINE

(maximum)

Reference only — 4 6

AESTHETICS (mg/L) ————

CATIONS — — 30 N/A

ANIONS — — 30 N/A

CO 2 (see Note 1) — — 15 N/A

(continued)

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