Drinking water quality · 2020
· Verified
What's in Cal/am Water Company - San Marino, CA tap water
28 contaminants were measured in the Cal/am Water Company - San Marino, CA water system's 2020 annual report. Each is shown below against its federal limit.
- Reporting year
- 2020
- Contaminants measured
- 28
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
state-level CCR
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Monitoring1 violation on recordresolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 7.1 mg/LMaximum82% San Marino Distribution System | 10 mg/LMCLG | Within the limit |
+By source (2)— 82% San Marino Distribution System, 18% MWD Weymouth
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 1 mg/LMaximum82% San Marino Distribution System | 1 mg/LMCLG | Within the limit |
+By source (2)— 82% San Marino Distribution System, 18% MWD Weymouth
| |||
| Dichloroacetic acidA haloacetic acid disinfection byproduct. | 0.89 ug/LAverageSystem-wide | None set | Within the limit |
| Trichloroacetic acidA haloacetic acid disinfection byproduct. | 0.79 ug/LAverageSystem-wide | None set | Within the limit |
| Bromochloroacetic acidA mixed-halogen haloacetic acid disinfection byproduct. | 0.54 ug/LAverageSystem-wide | None set | Within the limit |
| Dibromoacetic acidA brominated haloacetic acid disinfection byproduct. | 0.28 ug/LAverageSystem-wide | None set | Within the limit |
| Monobromoacetic acidA brominated haloacetic acid disinfection byproduct. | 0.24 ug/LAverageSystem-wide | None set | Within the limit |
| Chlorodibromoacetic acidA brominated haloacetic acid disinfection byproduct. | 0.2 ug/LAverageSystem-wide | None set | Within the limit |
| BromideA naturally occurring salt found in source water. | 0.54 ug/LAverageSystem-wide | None set | Detected — no federal limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 2.44 mg/LReported levelSystem-wide | 4 mg/LMRDLG | Within the limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 5.7 pCi/LMaximum82% San Marino Distribution System | 15 pCi/LMCLG | Within the limit |
+By source (2)— 82% San Marino Distribution System, 18% MWD Weymouth
| |||
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.19 pCi/LMaximum82% San Marino Distribution System | 0 pCi/LMCLG | Within the limit |
+By source (2)— 82% San Marino Distribution System, 18% MWD Weymouth
| |||
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 6 pCi/LMaximum18% MWD Weymouth | 50 pCi/LMCLG | Detected — no federal limit |
+By source (2)— 18% MWD Weymouth, 82% San Marino Distribution System
| |||
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 9 pCi/LMaximum82% San Marino Distribution System | 0.43 pCi/LMCLG | Detected — no federal limit |
+By source (2)— 82% San Marino Distribution System, 18% MWD Weymouth
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 2.9 ug/LMaximum82% San Marino Distribution System | 0.004 ug/LMCLG | Within the limit |
+By source (2)— 82% San Marino Distribution System, 18% MWD Weymouth
| |||
| CopperA metal that enters water from corroding household plumbing. | 0.266 mg/L90th percentileAt the tap | 1.3 mg/LMCLG | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.11 mg/LMaximum18% MWD Weymouth | 2 mg/LMCLG | Within the limit |
+By source (2)— 18% MWD Weymouth, 82% San Marino Distribution System
| |||
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.0 mg/L90th percentileAt the tap | 0.015 mg/LAction level | None detected |
| AluminumA common element sometimes used as a treatment coagulant. | 240 ug/LMaximum18% MWD Weymouth | None set | Detected — no federal limit |
+By source (2)— 18% MWD Weymouth, 82% San Marino Distribution System
| |||
| ManganeseA naturally occurring metal from soil and rock. | 1.84 ug/LAverageSystem-wide | None set | Detected — no federal limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 13.3 ug/LRunning annual avgSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 7.4 ug/LRunning annual avgSystem-wide | None set | Within the limit |
| Bromodichloroacetic acidA brominated haloacetic acid disinfection byproduct. | 0.11 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| HAA9 | 0.7 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 3.9 ug/LMaximum82% San Marino Distribution System | None set | Detected — no federal limit |
+By source (2)— 82% San Marino Distribution System, 18% MWD Weymouth
| |||
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.03 NTUReported levelSystem-wide | None set | Within the limit |
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 0.35 mg/LAverageSystem-wide | None set | Detected — no federal limit |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TetrachloroethyleneAn industrial solvent (PCE) used in dry cleaning and degreasing. | 2 %Maximum82% San Marino Distribution System | 0.06 %MCLG | Detected — no federal limit |
+By source (2)— 82% San Marino Distribution System, 18% MWD Weymouth
| |||
Source: Cal/am Water Company - San Marino, CA's 2020 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 Cal/am Water Company - San Marino, CA's water
+Is Cal/am Water Company - San Marino, CA tap water safe to drink in 2020?
Every one of the 28 contaminants measured in Cal/am Water Company - San Marino, CA's 2020 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Cal/am Water Company - San Marino, CA tap water?
28 contaminants were measured in Cal/am Water Company - San Marino, CA's 2020 Consumer Confidence Report, spanning inorganic chemicals, metals, and disinfection byproducts. 12 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Cal/am Water Company - San Marino, CA's 2020 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 Cal/am Water Company - San Marino, 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 2020 report; a new report will replace it once the utility publishes its next annual update.
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