Drinking water quality · 2023
· Verified
What's in SFPUC City Distribution Division, CA tap water
79 contaminants were measured in the SFPUC City Distribution Division, CA water system's 2023 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 79
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- Chromium, Total
- Service area
- CA
1.6× the limit
state-level CCR
At or above the federal limit
Where your water comes from · EPA SDWIS
SFPUC City Distribution Division, CA's drinking water comes from ground water, drawn from 7 sources.
Source
7ground water
- ZOO
- LAKE MERCED WELL
- WEST SUNSET WELL
- SOUTH SUNSET WELL
- + 3 more
Treatment
2treatment plants
- WEST SUNSET CHLORINATION TREATMENT
- ZOO WELL 05 WELLHEAD TREATMENT
Distribution
0storage units
Also buys water from SAN FRANCISCO REGIONAL WATER SYSTEM.
Source: EPA SDWIS facilities inventory. Methodology.
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium, TotalTotal chromium — the sum of all chromium forms, from natural deposits and industrial discharge. | 16 ug/LAverageSystem-wide | 10 ug/LMCL | At or above the limit |
| IronA naturally occurring metal common in groundwater. | 67.66666666666667 UG/LAverageSource water | 300 UG/LMCL | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | 84.8 UG/LAverageOther | 1000 UG/LMCL | Within the limit |
| BoronA naturally occurring element from rock and soil. | 41 ug/LAverageSystem-wide | 1000 ug/LMCL | Within the limit |
| Antimony | Not detected UG/LHighest single sampleSource water | 6 UG/LMCL | None detected |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | Not detected UG/LHighest single sampleSource water | 10 UG/LMCL | None detected |
| BariumA metal from erosion of natural deposits and industrial discharge. | Not detected UG/LHighest single sampleSource water | 1000 UG/LMCL | None detected |
| Beryllium | Not detected UG/LHighest single sampleSource water | 4 UG/LMCL | None detected |
| Cadmium | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| CopperA metal that enters water from corroding household plumbing. | Not detected UG/LHighest single sampleDistribution | 1000 UG/LMCL | None detected |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected UG/LHighest single sampleSource water | None set | None detected |
| ManganeseA naturally occurring metal from soil and rock. | Not detected UG/LHighest single sampleSource water | 50 UG/LMCL | None detected |
| MercuryA toxic metal from erosion of natural deposits and industrial runoff. | Not detected UG/LHighest single sampleSource water | 2 UG/LMCL | None detected |
| NickelA metal from natural deposits and industrial discharge. | Not detected UG/LHighest single sampleSource water | 100 UG/LMCL | None detected |
| SeleniumA trace element from natural deposits and industrial discharge. | Not detected UG/LHighest single sampleSource water | 50 UG/LMCL | None detected |
| Thallium | Not detected UG/LHighest single sampleSource water | 2 UG/LMCL | None detected |
| ZincA naturally occurring metal that can also enter water from corroding pipes. | Not detected UG/LHighest single sampleOther | 5000 UG/LMCL | None detected |
| CalciumA naturally occurring mineral that contributes to water hardness. | 3.11 MG/LAverageOther | None set | Detected — no federal limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 18.455454545454543 UG/LAverageSource water | None set | Detected — no federal limit |
| LithiumA naturally occurring element found in some groundwater. | 4.2 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 0.299 MG/LAverageOther | None set | Detected — no federal limit |
| SilicaA naturally occurring compound from sand and rock. | 7.5 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 5.28 MG/LAverageOther | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Nitrate Nitrite | 7.81 MG/LAverageSource water | 10 MG/LMCL | Within the limit |
| Carbon Tetrachloride | 0.3277777777777778 UG/LAverageSource water | 0.5 UG/LMCL | Within the limit |
| Chromium | 15 UG/LAverageSource water | 50 UG/LMCL | Within the limit |
| Pce | 0.706 UG/LAverageSource water | 5 UG/LMCL | Within the limit |
| Chlorobenzene | Not detected UG/LHighest single sampleSource water | 70 UG/LMCL | None detected |
| Cis Dichloroethylene 12 | Not detected UG/LHighest single sampleSource water | 6 UG/LMCL | None detected |
| Dichloroethane 12 | Not detected UG/LHighest single sampleSource water | 0.5 UG/LMCL | None detected |
| Dichloroethylene 11 | Not detected UG/LHighest single sampleSource water | 6 UG/LMCL | None detected |
| Dichloropropane 12 | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Mbaa | Not detected UG/LHighest single sampleDistribution | None set | None detected |
| O Dichlorobenzene | Not detected UG/LHighest single sampleSource water | 600 UG/LMCL | None detected |
| P Dichlorobenzene | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Styrene | Not detected UG/LHighest single sampleSource water | 100 UG/LMCL | None detected |
| Tce | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Trans Dichloroethylene 12 | Not detected UG/LHighest single sampleSource water | 10 UG/LMCL | None detected |
| Trichlorobenzene 124 | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Trichloroethane 111 | Not detected UG/LHighest single sampleSource water | 200 UG/LMCL | None detected |
| Trichloroethane 112 | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Vinyl Chloride | Not detected UG/LHighest single sampleSource water | 0.5 UG/LMCL | None detected |
| Dbaa | 0.5305555555555556 UG/LAverageDistribution | None set | Detected — no federal limit |
| Dcaa | 25.583333333333332 UG/LAverageDistribution | None set | Detected — no federal limit |
| Mcaa | 2.125 UG/LAverageDistribution | None set | Detected — no federal limit |
| Tcaa | 15.430555555555555 UG/LAverageDistribution | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 7.619 MG/LAverageSource water | 10 MG/LMCL | Within the limit |
| ChlorideA naturally occurring salt compound. | 38.949999999999996 MG/LAverageSource water | 500 MG/LMCL | Within the limit |
| SulfateA naturally occurring mineral from rock and soil. | 30.295 MG/LAverageSource water | 500 MG/LMCL | Within the limit |
| Asbestos | Not detected MFLHighest single sampleSource water | 7 MFLMCL | None detected |
| Cyanide | Not detected UG/LHighest single sampleSource water | 150 UG/LMCL | None detected |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | Not detected MG/LHighest single sampleSource water | 2 MG/LMCL | None detected |
| NitriteA compound from fertilizer runoff, sewage, and erosion of natural deposits. | Not detected MG/LHighest single sampleSource water | 1 MG/LMCL | None detected |
| BromideA naturally occurring salt found in source water. | Not detected ug/LAverageSystem-wide | None set | Detected — no federal limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 43.19444444444444 UG/LAverageDistribution | 60 UG/LMCL | Within the limit |
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 40.78333333333333 UG/LAverageDistribution | 80 UG/LMCL | Within the limit |
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 3 ug/LAverageSystem-wide | 10 ug/LMCL | Within the limit |
| BromoformA trihalomethane disinfection byproduct. | Not detected UG/LHighest single sampleDistribution | None set | None detected |
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | Not detected UG/LHighest single sampleSource water | 6 UG/LMCL | None detected |
| BromodichloromethaneA trihalomethane disinfection byproduct. | 2.876041666666667 UG/LAverageDistribution | None set | Detected — no federal limit |
| ChlorateA byproduct that can form during disinfection, especially when hypochlorite solutions degrade. | 58.1 UG/LAverageOther | None set | Detected — no federal limit |
| ChloroformA trihalomethane formed when chlorine reacts with organic matter in water. | 37.265208333333334 UG/LAverageDistribution | None set | Detected — no federal limit |
| DibromochloromethaneA trihalomethane disinfection byproduct. | 0.9435416666666666 UG/LAverageDistribution | None set | Detected — no federal limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChloramineA longer-lasting disinfectant made by combining chlorine with ammonia. | 2.6 mg/LAverageSystem-wide | 4 mg/LMRDL | Within the limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 535.1666666666666 UMHO/CMAverageSource water | 1600 UMHO/CMMCL | Within the limit |
| ColorA measure of visible tint in the water. | 5 UNITSAverageDistribution | 15 UNITSMCL | Within the limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 300 MG/LAverageSource water | 1000 MG/LMCL | Within the limit |
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.55 NTUAverageOther | 5 NTUMCL | Within the limit |
| OdorA measure of detectable smell in the water. | Not detected TONHighest single sampleSource water | 3 TONMCL | None detected |
| AlkalinityA measure of the water's capacity to neutralize acids. | 7.676666666666667 MG/LAverageOther | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 8.36 MG/LAverageOther | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 9.42 PHAverageOther | None set | Detected — no federal limit |
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 1.9 mg/LAverageSystem-wide | None set | Detected — no federal limit |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Benzene | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Dichloromethane | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Ethylbenzene | Not detected UG/LHighest single sampleSource water | 300 UG/LMCL | None detected |
| Toluene | Not detected UG/LHighest single sampleSource water | 150 UG/LMCL | None detected |
| XylenesA group of industrial solvents found in gasoline and paint. | Not detected UG/LHighest single sampleSource water | 1750 UG/LMCL | None detected |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Giardia lamblia | 0.01AverageSystem-wide | None set | Detected — no federal limit |
Source: SFPUC City Distribution Division, CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.
People also ask about SFPUC City Distribution Division, CA's water
+Is SFPUC City Distribution Division, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the SFPUC City Distribution Division, CA water utility lists 1 contaminant at or above the federal limit: Chromium, Total. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in SFPUC City Distribution Division, CA tap water?
79 contaminants were measured in SFPUC City Distribution Division, CA's 2023 Consumer Confidence Report, spanning metals, other, and disinfection byproducts. 56 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in SFPUC City Distribution Division, CA tap water?
One contaminant in SFPUC City Distribution Division, CA's 2023 report sits at or above the federal limit: Chromium, Total (1.6× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in SFPUC City Distribution Division, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Chromium, Total, at 1.6× the federal threshold. It belongs to the metals family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from SFPUC City Distribution Division, CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is SFPUC City Distribution Division, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2023 report; a new report will replace it once the utility publishes its next annual update.
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