| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 5.2 ug/LAverageWater Bank Effluent (CWR) | None set | Within the limit |
+By source (6)— Water Bank Wells, Water Bank Effluent (CWR), Raw Influent (State Water Project) +3 moreWater Bank WellsPlant avg4.8 ug/Lrange0–22 ug/L220% of limit Water Bank Effluent (CWR)Plant avg5.2 ug/Lrange3.4–7 ug/L70% of limit Raw Influent (State Water Project)Plant avg4.6 ug/Lrange2.7–5.6 ug/L56% of limit Quartz Hill Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Eastside Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Acton Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit
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| CopperA metal that enters water from corroding household plumbing. | 0.6 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| SeleniumA trace element from natural deposits and industrial discharge. | 0.58 ug/LAverageWater Bank Wells | None set | Within the limit |
+By source (6)— Water Bank Wells, Quartz Hill Plant Effluent (CWR), Water Bank Effluent (CWR) +3 moreWater Bank WellsPlant avg0.58 ug/Lrange0–7 ug/L14% of limit Quartz Hill Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Water Bank Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Acton Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Raw Influent (State Water Project)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Eastside Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit
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| AluminumA common element sometimes used as a treatment coagulant. | Not detected ug/LRangeWater Bank Wells | None set | None detected |
+By source (6)— Water Bank Wells, Raw Influent (State Water Project), Acton Plant Effluent (CWR) +3 moreWater Bank WellsPlant avgNot detected ug/LrangeNot detected ug/L Raw Influent (State Water Project)Plant avgNot detected ug/LrangeNot detected ug/L Acton Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L Eastside Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L Water Bank Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L Quartz Hill Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L
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| Antimony | Not detected ug/LRangeQuartz Hill Plant Effluent (CWR) | None set | None detected |
+By source (6)— Quartz Hill Plant Effluent (CWR), Eastside Plant Effluent (CWR), Raw Influent (State Water Project) +3 moreQuartz Hill Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Eastside Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Raw Influent (State Water Project)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Acton Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Water Bank Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Water Bank WellsPlant avgNot detected ug/LrangeNot detected ug/L0% of limit
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| BariumA metal from erosion of natural deposits and industrial discharge. | Not detected ug/LRangeWater Bank Wells | None set | None detected |
+By source (6)— Water Bank Wells, Quartz Hill Plant Effluent (CWR), Water Bank Effluent (CWR) +3 moreWater Bank WellsPlant avgNot detected ug/LrangeNot detected ug/L0% of limit Quartz Hill Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Water Bank Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Raw Influent (State Water Project)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Eastside Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Acton Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit
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| Beryllium | Not detected ug/LRangeWater Bank Effluent (CWR) | None set | None detected |
+By source (6)— Water Bank Effluent (CWR), Raw Influent (State Water Project), Water Bank Wells +3 moreWater Bank Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Raw Influent (State Water Project)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Water Bank WellsPlant avgNot detected ug/LrangeNot detected ug/L0% of limit Acton Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Eastside Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Quartz Hill Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit
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| Cadmium | Not detected ug/LRangeWater Bank Wells | None set | None detected |
+By source (6)— Water Bank Wells, Eastside Plant Effluent (CWR), Raw Influent (State Water Project) +3 moreWater Bank WellsPlant avgNot detected ug/LrangeNot detected ug/L0% of limit Eastside Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Raw Influent (State Water Project)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Acton Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Water Bank Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Quartz Hill Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit
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| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected ug/LAverageRaw Influent (State Water Project) | None set | Within the limit |
+By source (8)— No. of Samples Collected, Quartz Hill Plant Effluent (CWR), Eastside Plant Effluent (CWR) +5 moreNo. of Samples CollectedPlant 67% of limit Quartz Hill Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Eastside Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Raw Influent (State Water Project)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Water Bank WellsPlant avgNot detected ug/LrangeNot detected ug/L0% of limit No. of Schools Requesting Lead SamplingPlant 0% of limit Acton Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Water Bank Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit
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| MercuryA toxic metal from erosion of natural deposits and industrial runoff. | Not detected ug/LRangeQuartz Hill Plant Effluent (CWR) | None set | None detected |
+By source (6)— Quartz Hill Plant Effluent (CWR), Water Bank Effluent (CWR), Raw Influent (State Water Project) +3 moreQuartz Hill Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Water Bank Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Raw Influent (State Water Project)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Acton Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Water Bank WellsPlant avgNot detected ug/LrangeNot detected ug/L0% of limit Eastside Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit
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| NickelA metal from natural deposits and industrial discharge. | Not detected ug/LRangeRaw Influent (State Water Project) | None set | None detected |
+By source (6)— Raw Influent (State Water Project), Quartz Hill Plant Effluent (CWR), Acton Plant Effluent (CWR) +3 moreRaw Influent (State Water Project)Plant avgNot detected ug/LrangeNot detected ug/L Quartz Hill Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L Acton Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L Water Bank WellsPlant avgNot detected ug/LrangeNot detected ug/L Eastside Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L Water Bank Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L
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| Strontium | Not detected pCi/LAverageRaw Influent (State Water Project) | None set | None detected |
| Thallium | Not detected ug/LAverageActon Plant Effluent (CWR) | None set | None detected |
+By source (6)— Acton Plant Effluent (CWR), Water Bank Effluent (CWR), Eastside Plant Effluent (CWR) +3 moreActon Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Water Bank Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Eastside Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Quartz Hill Plant Effluent (CWR)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Raw Influent (State Water Project)Plant avgNot detected ug/LrangeNot detected ug/L0% of limit Water Bank WellsPlant avgNot detected ug/LrangeNot detected ug/L0% of limit
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| BoronA naturally occurring element from rock and soil. | 9 mg/LReported levelSystem-wide | None set | Detected — no federal limit |