Drinking water quality · 2021
· Verified
What's in So. Cal. Edison Co.-santa Catalina — Avalon, Ca, CA tap water
39 contaminants were measured in the So. Cal. Edison Co.-santa Catalina — Avalon, Ca, CA water system's 2021 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2021
- Contaminants measured
- 39
- Over federal limit
- 1
- Approaching the limit
- 1
- Worst contaminant
- Turbidity
- Service area
- CA
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 2 NTUAverageof Levels Detected | 1 NTUMCL | At or above the limit |
| AlkalinityA measure of the water's capacity to neutralize acids. | 350 mg/LAverageof Levels Detected | None set | Detected — no federal limit |
| Bicarbonate | 430 mg/LAverageof Levels Detected | None set | Detected — no federal limit |
| ColorA measure of visible tint in the water. | 6Averageof Levels Detected | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 440 mg/LAverageof Levels Detected | None set | Detected — no federal limit |
| OdorA measure of detectable smell in the water. | 3Averageof Levels Detected | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 7.2Averageof Levels Detected | None set | Detected — no federal limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 1800–2000RangeSystem-wide | None set | Detected — no federal limit |
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 0.62 mg/LAverageof Levels Detected | None set | Detected — no federal limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 1100 mg/LAverageof Levels Detected | 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. | 74 ug/LAverageof Levels Detected | None set | Approaching the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 26 ug/LAverageof Levels Detected | None set | Within the limit |
| BromodichloromethaneA trihalomethane disinfection byproduct. | 1.9 ug/LAverageof Levels Detected | 0.06 ug/LPublic health goal | Detected — no federal limit |
| BromoformA trihalomethane disinfection byproduct. | 26 ug/LAverageof Levels Detected | 0.5 ug/LPublic health goal | Detected — no federal limit |
| ChloroformA trihalomethane formed when chlorine reacts with organic matter in water. | 11 ug/LAverageof Levels Detected | 0.4 ug/LPublic health goal | Detected — no federal limit |
| DibromochloromethaneA trihalomethane disinfection byproduct. | 8.3 ug/LAverageof Levels Detected | None set | Detected — no federal limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 3 ug/LAverageof Levels Detected | None set | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.19 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 1.8 ug/L90th percentileAt the tap | None set | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.11 mg/LAverageof Levels Detected | 2 mg/LMCL | Within the limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 82 mg/LAverageof Levels Detected | None set | Detected — no federal limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 1.1 ug/LAverageof Levels Detected | 0.02 ug/LPublic health goal | Detected — no federal limit |
| IronA naturally occurring metal common in groundwater. | 930 ug/LAverageof Levels Detected | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 57 mg/LAverageof Levels Detected | None set | Detected — no federal limit |
| ManganeseA naturally occurring metal from soil and rock. | 29.1 ug/LAverageof Levels Detected | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 110 mg/LAverageof Levels Detected | None set | Detected — no federal limit |
| ZincA naturally occurring metal that can also enter water from corroding pipes. | 0.021 mg/LAverageof Levels Detected | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 4.2 pCi/LAverageof Levels Detected | 15 pCi/LMCL | Within the limit |
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.26 pCi/LAverageof Levels Detected | 5 pCi/LMCL | Within the limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 0.5 pCi/LAverageof Levels Detected | 20 pCi/LMCL | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Total | 0.98 mg/LAverageof Levels Detected | None set | Within the limit |
| Nitrate Nitrite | 0.58 mg/LAverageof Levels Detected | 10 mg/LMCL | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Dibromoacetic acidA brominated haloacetic acid disinfection byproduct. | 8.3 ug/LAverageof Levels Detected | None set | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.73 mg/LAverageof Levels Detected | 10 mg/LMCL | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.22 mg/LAverageof Levels Detected | 4 mg/LMCL | Within the limit |
| Dichloroacetic acidA haloacetic acid disinfection byproduct. | 2 ug/LAverageof Levels Detected | None set | Within the limit |
| Monobromoacetic acidA brominated haloacetic acid disinfection byproduct. | 1.7 ug/LAverageof Levels Detected | None set | Within the limit |
| ChlorideA naturally occurring salt compound. | 360 mg/LAverageof Levels Detected | None set | Detected — no federal limit |
| SulfateA naturally occurring mineral from rock and soil. | 60 mg/LAverageof Levels Detected | None set | Detected — no federal limit |
People also ask about So. Cal. Edison Co.-santa Catalina — Avalon, Ca, CA's water
+Is So. Cal. Edison Co.-santa Catalina — Avalon, Ca, CA tap water safe to drink in 2021?
The 2021 Consumer Confidence Report for the So. Cal. Edison Co.-santa Catalina — Avalon, Ca, CA water utility lists 1 contaminant at or above the federal limit: Turbidity. 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 So. Cal. Edison Co.-santa Catalina — Avalon, Ca, CA tap water?
39 contaminants were measured in So. Cal. Edison Co.-santa Catalina — Avalon, Ca, CA's 2021 Consumer Confidence Report, spanning metals, physical & aggregate, and inorganic chemicals. 13 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 So. Cal. Edison Co.-santa Catalina — Avalon, Ca, CA tap water?
One contaminant in So. Cal. Edison Co.-santa Catalina — Avalon, Ca, CA's 2021 report sits at or above the federal limit: Turbidity (2.0× 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 So. Cal. Edison Co.-santa Catalina — Avalon, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2021 report is Turbidity, at 2.0× the federal threshold. It belongs to the physical & aggregate family of contaminants.
+Are any contaminants in So. Cal. Edison Co.-santa Catalina — Avalon, Ca, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: TTHM. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from So. Cal. Edison Co.-santa Catalina — Avalon, Ca, CA's 2021 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 So. Cal. Edison Co.-santa Catalina — Avalon, Ca, 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 2021 report; a new report will replace it once the utility publishes its next annual update.