View File - Development Services - City of Oxnard

TABLE 3-1UWCD and Oxnard Groundwater QualityConstituent Units MCL UWCD RangeCity WellRangePrimary StandardsTurbidity NTU 0.5 0.01 – 0.27 NAMicrobiologicalTotal Coliform 2 or 5% 0 0Organic ChemicalsTrihalomethanes µg/L 100 18 – 31 NAInorganic ChemicalsAluminum mg/L 1 ND ND – 0.04Arsenic µg/L 50 ND ND – 2.0Barium mg/L 1 0.02 0.02 – 0.08Cadmium µg/L 5 ND – 0.2 ND – 0.2Chromium µg/L 50 3 ND – 5.0Fluoride mg/L 2 0.6 – 0.7 0.3 – 0.7Lead µg/L 50 ND ND – 0.5Nickel µg/L 100 ND – 2.0 ND – 5.0Nitrate (as N) mg/L 10 1.3 – 5.6 2.3 – 3.8Selenium µg/L 50 6 11 – 30RadionuclidesGross Alpha Particle Activity pCi/l 15 3.5 – 8.0 4 – 13Gross Beta Particle Activity pCi/l 50 8 3 – 13Radium 226 pCi/l 3 ND – 0.15 0 – 0.8Radon pCi/l None 291 – 357 170 – 520Uranium pCi/l 20 5 n/aSecondary StandardsChloride mg/L 500 47 – 54 48 – 64Color units 15 ND ND – 8Iron µg/L 300 ND ND – 60Manganese µg/L 50 ND ND –90Odor Threshold units 3 ND NDSpecific Conductance umhos/cm 1,600 1,280 – 1,500 1,370 – 1,720Sulfate mg/L 500 434 – 514 463 – 592Total Dissolved Solids mg/L 1,000 920 – 1,100 1,000 – 1,380Additional Unregulated ParametersAlkalinity mg/L NS 190 – 200 200 – 250Boron mg/L NS 0.6 – 0.7 0.6 – 0.8Calcium mg/L NS 125 – 146 132 – 181Hardness mg/L NS 497 – 582 510 – 715Magnesium mg/L NS NA 45 - 64pH units 6.5 - 8.5 NA 7.2 – 7.5Potassium mg/L NS NA 5 – 6Sodium mg/L NS 88 – 104 94 – 114Notes:Values are reported from the City of Oxnard's 2000 Consumer Confidence Report.NA – Not analyzedND – Not detectableNS – No applicable standardW112003002SCO LW700.xls/033460008/Table 3-1