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Big Bend 2018 Water Quality Summary

Substance Average Value MCL Units
ALKALINITY 130 N/A ppm
ALPHA EMITTERS 3 15 pCi/L
ALUMINUM <5 200 ppb(1)
ANTIMONY <0.4 6 ppb
ARSENIC 1 10 ppb
ASBESTOS <0.2 7 MFL
BARIUM 0.1 2 ppm
BERYLLIUM <0.4 4 ppb
BROMATE 6.0 10 ppb
BROMIDE <20 N/A ppb
CADMIUM <0.5 5 ppb
CALCIUM 75 N/A ppm
CHLORIDE 95 400 ppm(1)
CHLORINE RESIDUAL 0.7 4.0(2) ppm
CHROMIUM <3 100 ppb
COLIFORM, TOTAL 0 ≤1 number samples positive per month
COLOR, True 0.9 15 PCU(1)
CONDUCTIVITY 1002 N/A µS/cm
COPPER <0.005 1.0 ppm(1)
CYANIDE <25 200 ppb
FLUORIDE 0.3 4.0
2.0
ppm
ppm(1)
HALOACETIC ACIDS (Total Regulated) 23 60 ppb
HARDNESS 289
16.9
N/A ppm
gpg
IRON <50 600 ppb(1)
LEAD <0.3 N/A ppb
MAGNESIUM 25 150 ppm(1)
MANGANESE <5 100 ppb(1)
MBAS <100 500 ppb(1)
MERCURY <0.2 2 ppb
MOLYBDENUM <5 N/A ppb
NICKEL <5 N/A ppb
NITRATE (as NITROGEN) 0.4 10 ppm
NITRITE (as NITROGEN) <0.02 1 ppm
ODOR 0.58 3 TON(1)
ORTHO PHOSPHATE 44 N/A ppb
PERCHLORATE 1.4 N/A ppb
pH 8.1 6.5 - 8.5 pH units(1)
POTASSIUM 4.9 N/A ppm
RADIUM 226 AND RADIUM 228 (Combined) 1 5 pCi/L
SATURATION INDEX 0.6 N/A N/A
SELENIUM 2 50 ppb
SILICA 7.4 N/A ppm
SILVER <5 100 ppb(1)
SODIUM 91 N/A ppm(3)
SULFATE 237 500 ppm(1)
TEMPERATURE 23.5 N/A deg C
THALLIUM <0.2 2 ppb
TOTAL DISSOLVED SOLIDS 617 1000 ppm(1)
TRIHALOMETHANES (Total) 67 80 ppb
TURBIDITY 0.11 0.3 NTU(4)
URANIUM 4 30 ppb
VANADIUM <5 N/A ppb
ZINC <5 5000 ppb(1)
 
Substance Average Value MCL Units
(1,2,4-)TRICHLOROBENZENE <0.5 70 ppb
1,1,1-TRICHLOROETHANE <0.5 200 ppb
1,1,2-TRICHLOROETHANE <0.5 5 ppb
1,1-DICHLOROETHYLENE <0.5 7 ppb
1,2 DICHLOROPROPANE <0.5 5 ppb
1,2 -DICHLOROBENZENE <0.5 600 ppb
1,2-DICHLOROETHANE <0.5 5 ppb
1,4 -DICHLOROBENZENE <0.5 75 ppb
2,3,7,8-TCDD (DIOXIN) <0.005 0.03 ppt
2,4-D <0.07 70 ppb
ALACHLOR <0.1 2 ppb
ATRAZINE <0.05 3 ppb
BENZENE <0.5 5 ppb
CARBOFURAN <0.5 40 ppb
CARBON TETRACHLORIDE <0.5 5 ppb
CHLORDANE <0.1 2 ppb
CHLOROBENZENE <0.5 100 ppb
cis-1,2-DICHLOROETHYLENE <0.5 70 ppb
DALAPON <0.4 200 ppb
DI (2-ETHYLHEXYL) ADIPATE <0.6 400 ppb
DI (2-ETHYLHEXYL) PHTHALATE <0.6 6 ppb
DIBROMOCHLOROPROPANE <0.01 0.2 ppb
DICHLOROMETHANE <0.5 5 ppb
DINOSEB <0.1 7 ppb
DIQUAT <0.4 20 ppb
ENDOTHALL <8 100 ppb
ENDRIN <0.01 2 ppb
ETHYLBENZENE <0.5 700 ppb
ETHYLENE DIBROMIDE <0.01 0.05 ppb
GLYPHOSATE <6 700 ppb
HEPTACHLOR EPOXIDE <0.01 0.2 ppb
HEPTACHLOR (H-34, HEPTOX) <0.01 0.4 ppb
HEXACHLOROBENZENE <0.05 1 ppb
HEXACHLOROCYCLOPENTADIENE <0.05 50 ppb
LINDANE <0.01 0.2 ppb
METHOXYCHLOR <0.05 40 ppb
MTBE <2 N/A ppb
OXAMYL (VYDATE) <0.5 200 ppb
PAHs (benzo(a)pyrene) <0.02 0.2 ppb
PENTACHLOROPHENOL <0.04 1 ppb
PICLORAM <0.1 500 ppb
POLYCHLORINATED BIPHENYLS <0.1 0.5 ppb
SILVEX (2,4,5 - TP) <0.2 50 ppb
SIMAZINE <0.05 4 ppb
STYRENE <0.5 100 ppb
TETRACHLOROETHYLENE <0.5 5 ppb
TOLUENE <0.5 1000 ppb
TOXAPHENE <1 3 ppb
trans-1,2 DICHLOROETHYLENE <0.5 100 ppb
TRICHLOROETHYLENE <0.5 5 ppb
VINYL CHLORIDE <0.5 2 ppb
XYLENES <0.5 10,000 ppb
  • (1) State of Nevada Secondary Standard
  • (2) MRDL
  • (3) Monitoring requirement only, no MCL
  • (4) Treatment technique requirement

"<" - less than

µS/cm - Micro Siemens per centimeter

Action Level - 90 percent of sample results must be less than this level

gpg - grains per gallon

MCL - Maximum Contaminant Level Set by EPA

MFL - Million Fibers per Liter, with fiber length > 10 microns

MRDL - Maximum Residual Disinfectant Level

N/A - Not applicable, No Standard Set

NTU - Nephelometric Turbidity Unit

pCi/L - picocuries per liter

PCU - Platinum Cobalt Units

ppb - parts per billion

ppm - parts per million

ppt - parts per trillion

TON - threshold odor number