# City of Sunnyvale, CA — Drinking Water Quality (2026) > Contaminant levels for the City of Sunnyvale, CA public water system from its 2026 Consumer Confidence Report, compared to federal limits. - Page: https://www.thewatermap.com/water/ca/sunnyvale/2026 - JSON API: https://www.thewatermap.com/api/water/ca/sunnyvale/2026 - Source: the utility's annual Consumer Confidence Report (CCR) - Verification: transcribed by a model, cross-checked by a second model, approved before publishing - Reporting year: 2026 - Contaminants measured: 37 - Contaminants with a federal limit: 4 - Contaminants at or above the federal limit: 0 - Part of The Water Map — https://www.thewatermap.com ## Contaminants measured | Contaminant | Category | Measured level | Sampling context | Federal limit | Status | |---|---|---|---|---|---| | Bromodichloromethane | Disinfection byproducts | 10.75 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit | | Bromoform | Disinfection byproducts | 2.3762499999999998 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit | | Chloroform | Disinfection byproducts | 13.4375 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit | | Dibromochloromethane | Disinfection byproducts | 8.18625 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit | | HAA5 | Disinfection byproducts | 15.625 UG/L (Average) | Distribution | 60 UG/L (MCL) | Within the limit | | TTHM | Disinfection byproducts | 34.7625 UG/L (Average) | Distribution | 80 UG/L (MCL) | Within the limit | | Nitrate | Inorganic chemicals | 3.1983333333333337 MG/L (Average) | Source water | 10 MG/L (MCL) | Within the limit | | Chromium, Hexavalent | Metals | 1.8633333333333333 UG/L (Average) | Source water | 10 UG/L (MCL) | Within the limit | | Dbaa | Other | 2.9250000000000003 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit | | Dcaa | Other | 8 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit | | Mbaa | Other | Not detected UG/L (Highest single sample) | Distribution | No federal limit | None detected | | Mcaa | Other | 1.3 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit | | Tcaa | Other | 4.025 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit | | 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | 4:2 Fluorotelomer sulfonic acid (4:2 FTS) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | 6:2 Fluorotelomer sulfonic acid (6:2 FTS) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | 8:2 Fluorotelomer sulfonic acid (8:2 FTS) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Hexafluoropropylene oxide dimer acid | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Perfluoro-3-methoxypropanoic acid (PFMPA) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Perfluoro-4-methoxybutanoic acid (PFMBA) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Perfluorodecanoic acid (PFDA) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Perfluorododecanoic acid (PFDoA) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Perfluoroheptanesulfonic acid (PFHpS) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Perfluoroheptanoic acid | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Perfluorohexanoic acid | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Perfluorononanoic acid | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Perfluoropentanesulfonic acid (PFPeS) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Perfluoropentanoic acid | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Perfluorotetradecanoic acid (PFTeDA) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Perfluorotridecanoic acid (PFTrDA) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | Perfluoroundecanoic acid (PFUnA) | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | | PFBA | PFAS ("forever chemicals") | Not detected NG/L (Highest single sample) | Source water | No federal limit | None detected | ## What these contaminants are - **Bromodichloromethane** — A trihalomethane disinfection byproduct. Counted within regulated total trihalomethanes; long-term exposure is associated with cancer and reproductive effects. - **Bromoform** — A trihalomethane disinfection byproduct. Counted within regulated total trihalomethanes; long-term exposure is associated with liver and kidney effects. - **Chloroform** — A trihalomethane formed when chlorine reacts with organic matter in water. A component of regulated total trihalomethanes; long-term exposure is linked to liver and kidney effects. - **Dibromochloromethane** — A trihalomethane disinfection byproduct. Part of regulated total trihalomethanes; long-term exposure is linked to nervous-system, liver, and kidney effects. - **HAA5** — Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. Long-term exposure above the federal limit is associated with an increased cancer risk. - **TTHM** — Total trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. Long-term exposure above the federal limit is linked to liver, kidney, and central-nervous-system effects and increased cancer risk. - **Nitrate** — A compound from fertilizer runoff, septic systems, and erosion of natural deposits. Levels above the federal limit can cause 'blue baby syndrome,' a serious oxygen-transport condition in infants. - **Chromium, Hexavalent** — Hexavalent chromium ('chromium-6') — the more toxic form of chromium. A known carcinogen by inhalation; regulated nationally only within the total-chromium limit, with stricter limits in some states. - **11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)** — 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid, a chlorinated PFAS compound. Monitored under EPA rules as part of broad PFAS surveillance. - **4,8-Dioxa-3H-perfluorononanoic acid (ADONA)** — ADONA, a newer-generation PFAS replacement compound. Monitored under EPA rules as part of broad PFAS surveillance. - **4:2 Fluorotelomer sulfonic acid (4:2 FTS)** — 4:2 fluorotelomer sulfonic acid, a PFAS-related compound. Monitored under EPA rules as part of broad PFAS surveillance. - **6:2 Fluorotelomer sulfonic acid (6:2 FTS)** — 6:2 fluorotelomer sulfonic acid, a PFAS-related compound. Monitored under EPA rules as part of broad PFAS surveillance. - **8:2 Fluorotelomer sulfonic acid (8:2 FTS)** — 8:2 fluorotelomer sulfonic acid, a PFAS-related compound. Monitored under EPA rules as part of broad PFAS surveillance. - **9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)** — 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid, a chlorinated PFAS compound. Monitored under EPA rules as part of broad PFAS surveillance. - **Hexafluoropropylene oxide dimer acid** — HFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound. Regulated by the EPA at 10 parts per trillion and included in the PFAS Hazard Index. - **N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)** — N-ethyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. Monitored under EPA rules as part of broad PFAS surveillance. - **N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)** — N-methyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. Monitored under EPA rules as part of broad PFAS surveillance. - **Perfluoro-3-methoxypropanoic acid (PFMPA)** — Perfluoro-3-methoxypropanoic acid, a PFAS-related compound. Monitored under EPA rules as part of broad PFAS surveillance. - **Perfluoro-4-methoxybutanoic acid (PFMBA)** — Perfluoro-4-methoxybutanoic acid, a PFAS-related compound. Monitored under EPA rules as part of broad PFAS surveillance. - **Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)** — Perfluoro(2-ethoxyethane)sulfonic acid, a PFAS-related compound. Monitored under EPA rules as part of broad PFAS surveillance. - **Perfluorodecanoic acid (PFDA)** — Perfluorodecanoic acid, a longer-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent and bioaccumulative. - **Perfluorododecanoic acid (PFDoA)** — Perfluorododecanoic acid, a longer-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent and bioaccumulative. - **Perfluoroheptanesulfonic acid (PFHpS)** — Perfluoroheptanesulfonic acid, a PFAS 'forever chemical.' Monitored under EPA rules; persistent in the environment. - **Perfluoroheptanoic acid** — Perfluoroheptanoic acid, a PFAS 'forever chemical.' Monitored under EPA rules; persistent in the environment. - **Perfluorohexanoic acid** — Perfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent and widely detected. - **Perfluorononanoic acid** — Perfluorononanoic acid, a PFAS 'forever chemical.' Regulated by the EPA at 10 parts per trillion and included in the PFAS Hazard Index. - **Perfluoropentanesulfonic acid (PFPeS)** — Perfluoropentanesulfonic acid, a PFAS 'forever chemical.' Monitored under EPA rules; persistent in the environment. - **Perfluoropentanoic acid** — Perfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent in the environment. - **Perfluorotetradecanoic acid (PFTeDA)** — Perfluorotetradecanoic acid, a longer-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent and bioaccumulative. - **Perfluorotridecanoic acid (PFTrDA)** — Perfluorotridecanoic acid, a longer-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent and bioaccumulative. - **Perfluoroundecanoic acid (PFUnA)** — Perfluoroundecanoic acid, a longer-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent and bioaccumulative. - **PFBA** — Perfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent in the environment and the human body. ## How to read this - A water-quality report covers an entire service area, not a single address. - 'Federal limit' is the EPA standard (MCL, action level, treatment technique, etc.) that the measured level is compared against. - 'At or above the federal limit' means the utility's own reported figure met or exceeded that standard. _Figures are the utility's own published numbers. Generated 2026-05-26 from thewatermap.com._