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River Mountains Water Treatment Plant 2024 Water Quality Summary

The Water Authority provides full water analyses for the water at its two treatment facilities before it is delivered to your provider. 

Substance Average value MCL Units
ALKALINITY, as HCO3 138 N/A ppm
ALPHA EMITTERS 2.7 15 pCi/L
ALUMINUM <5 200 ppb(1)
ANTIMONY <0.4 6 ppb
ARSENIC 2 10 ppb
BARIUM 0.2 2 ppm
BERYLLIUM <0.4 4 ppb
BROMATE 4.4 10 ppb
BROMIDE <20 N/A ppb
CADMIUM <0.5 5 ppb
CALCIUM 80 N/A ppm
CHLORIDE 113 400 ppm(1)
CHLORINE RESIDUAL 0.95 4(2) ppm
CHROMIUM, TOTAL <3 100 ppb
COLIFORM, TOTAL 0 ≤1 number samples positive per month
COLOR, TRUE 1 15 PCU(1)
CONDUCTIVITY 1070 N/A µS/cm
COPPER <0.005 1 ppm(1)
CYANIDE <25 200 ppb
FLUORIDE (3) 0.72 4
2
ppm
ppm(1)
HALOACETIC ACIDS (Total regulated) 9.1 60 ppb
HARDNESS 304
18
N/A ppm
gpg
IRON <50 600 ppb(1)
LEAD <0.3 N/A ppb
MAGNESIUM 25.5 150 ppm(1)
MANGANESE <5 100 ppb(1)
MBAS 0.069 500 ppb(1)
MERCURY <0.2 2 ppb
MOLYBDENUM <5 N/A ppb
NICKEL <5 N/A ppb
NITRATE (as NITROGEN) 0.58 10 ppm
NITRITE (as NITROGEN) <0.02 1 ppm
ODOR 1 3 TON(1)
ORTHO PHOSPHATE (as PO4) 103 N/A ppb
PERCHLORATE 1.2 N/A ppb
pH 7.9 6.5- 8.5 pH units(1)
POTASSIUM 5.6 N/A ppm
RADIUM 226 AND RADIUM 228 (Combined) <0.4 5 pCi/L
SATURATION INDEX 0.39 N/A N/A
SELENIUM 2.3 50 ppb
SILICA 7.6 N/A ppm
SILVER <5 100 ppb(1)
SODIUM 103 N/A ppm(4)
SULFATE 235 500 ppm(1)
TEMPERATURE 15 N/A deg C
THALLIUM <0.2 2 ppb
TOTAL DISSOLVED SOLIDS 656 1000 ppm(1)
TOTAL ORGANIC CARBON 2.5 N/A ppm
TRIHALOMETHANES (Total) 16 80 ppb
TURBIDITY (Maximum value) 0.07 0.3 NTU(5)
URANIUM 4.2 30 ppb
VANADIUM <5 N/A ppb
ZINC 0.08 5 ppm(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 <0.1 70 ppb
ALACHLOR <0.1 2 ppb
ATRAZINE <0.1 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 <1 200 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 <0.2 7 ppb
DIQUAT <0.4 20 ppb
ENDOTHALL <5 100 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 <0.1 1 ppb
HEXACHLOROCYCLOPENTADIENE <0.1 50 ppb
LINDANE <0.02 0.2 ppb
METHOXYCHLOR <0.1 40 ppb
MTBE <0.5 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 <0.07 4 ppb
STYRENE <0.5 100 ppb
TETRACHLOROETHYLENE <0.5 5 ppb
TOLUENE <0.5 1000 ppb
TOXAPHENE <0.5 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) Fluoridation started March 2000
  • (4) Monitoring requirement only, no MCL
  • (5) Treatment technique requirement

MCL - maximum contaminant level set by EPA

MFL - million fibers per liter, with fiber length > 10 microns

N/A - not applicable, no standard set

NTU - nephelometric turbidity unit

pCi/L - picocuries per liter

ppb - parts per billion

ppm - parts per million

ppt - parts per trillion

µS/cm - micro siemens per centimeter

PCU - platinum cobalt units

gpg - grains per gallon

TON - threshold odor number

MRDL - maximum residual disinfectant level

" < " - less than