Drinking water quality · 2023
· Verified
What's in Mesa Del Toro Mwc, CA tap water
71 contaminants were measured in the Mesa Del Toro Mwc, CA water system's 2023 annual report. Each is shown below against its federal limit — 5 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 71
- Over federal limit
- 5
- Approaching the limit
- 2
- Worst contaminant
- Manganese
- Service area
- CA
- ManganeseMetals · Average570 UG/Llimit 50 UG/L · 11.4× the limit
- IronMetals · Average2347.5 UG/Llimit 300 UG/L · 7.8× the limit
- ColorPhysical & aggregate · Average28.5 UNITSlimit 15 UNITS · 1.9× the limit
- ArsenicMetals · Average13.95 UG/Llimit 10 UG/L · 1.4× the limit
- TurbidityPhysical & aggregate · Average6.325 NTUlimit 5 NTU · 1.3× the limit
Where your water comes from · EPA SDWIS
Mesa Del Toro Mwc, CA's drinking water comes from ground water, drawn from 2 sources.
Source
- WELL
- WELL 02
Treatment
Distribution
Historical readings · EPA Six-Year Review (2012–2019)
1 contaminant historically over EPA limits in Mesa Del Toro Mwc, CA
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
ARSENIC worst: 2014 | 0.03 mg/L 3.0× 2.3× the national p90 | 0.01 mg/L | '12'13'14'15 |
FLUORIDE worst: 2012 | 0.33 mg/L within | 4 mg/L | '12'17 |
NITRATE worst: 2013 | 0.678 mg/L within | 10 mg/L | '13 |
CHROMIUM worst: 2017 | 0.004 mg/L within below national p90 | 0.1 mg/L | '17 |
SELENIUM worst: 2017 | 0.001 mg/L within | 0.05 mg/L | '17 |
BARIUM worst: 2017 | 0.026 mg/L within below national p90 | 2 mg/L | '17 |
TOLUENE worst: 2014 | 0.00075 mg/L within | 1 mg/L | '14 |
COPPER worst: 2017 | 0.003 mg/L below national p90 | — | '17 |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ManganeseA naturally occurring metal from soil and rock. | 570 UG/LAverageSource water | 50 UG/LMCL | At or above the limit |
| IronA naturally occurring metal common in groundwater. | 2347.5 UG/LAverageSource water | 300 UG/LMCL | At or above the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 1.3299999999999987 UG/L90th percentileDistribution | 15 UG/LAl | Within the limit |
| Cadmium | 0.3125 UG/LAverageSource water | 5 UG/LMCL | Within the limit |
| NickelA metal from natural deposits and industrial discharge. | 5.6 UG/LAverageSource water | 100 UG/LMCL | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | Not detected UG/LHighest single sampleSource water | 1000 UG/LMCL | None detected |
| Antimony | Not detected UG/LHighest single sampleSource water | 6 UG/LMCL | None detected |
| Beryllium | Not detected UG/LHighest single sampleSource water | 4 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 |
| 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 sampleSource water | 5000 UG/LMCL | None detected |
| CalciumA naturally occurring mineral that contributes to water hardness. | 73.2 MG/LAverageSource water | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 24.45 MG/LAverageSource water | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 13.850000000000001 MG/LAverageSource water | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 123.5 MG/LAverageSource water | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ColorA measure of visible tint in the water. | 28.5 UNITSAverageSource water | 15 UNITSMCL | At or above the limit |
| TurbidityA measure of cloudiness from suspended particles in the water. | 6.325 NTUAverageSource water | 5 NTUMCL | At or above the limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 816.8 MG/LAverageSource water | 1000 MG/LMCL | Approaching the limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 1296.6 UMHO/CMAverageSource water | 1600 UMHO/CMMCL | Approaching 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. | 215.14285714285714 MG/LAverageSource water | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 429 MG/LAverageSource water | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 7.65 PHAverageSource water | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| SulfateA naturally occurring mineral from rock and soil. | 235.5 MG/LAverageSource water | 500 MG/LMCL | Within the limit |
| ChlorideA naturally occurring salt compound. | 132.5 MG/LAverageSource water | 500 MG/LMCL | Within the limit |
| Cyanide | Not detected UG/LHighest single sampleSource water | 150 UG/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. | 0.45 MG/LAverageSource water | None set | Detected — no federal limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 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 |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Carbofuran | Not detected UG/LHighest single sampleSource water | 18 UG/LMCL | None detected |
| Carbon Tetrachloride | Not detected UG/LHighest single sampleSource water | 0.5 UG/LMCL | None detected |
| 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 |
| Deha | Not detected UG/LHighest single sampleSource water | 400 UG/LMCL | None detected |
| Dehp | Not detected UG/LHighest single sampleSource water | 4 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 |
| Dinoseb | Not detected UG/LHighest single sampleSource water | 7 UG/LMCL | None detected |
| Diquat | Not detected UG/LHighest single sampleSource water | 20 UG/LMCL | None detected |
| Nitrate Nitrite | Not detected MG/LHighest single sampleSource water | 10 MG/LMCL | None detected |
| O Dichlorobenzene | Not detected UG/LHighest single sampleSource water | 600 UG/LMCL | None detected |
| Oxamyl | Not detected UG/LHighest single sampleSource water | 50 UG/LMCL | None detected |
| P Dichlorobenzene | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Pce | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Pentachlorophenol | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Picloram | Not detected UG/LHighest single sampleSource water | 500 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 |
| Twofourd | Not detected UG/LHighest single sampleSource water | 70 UG/LMCL | None detected |
| Vinyl Chloride | Not detected UG/LHighest single sampleSource water | 0.5 UG/LMCL | None detected |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AtrazineA widely used agricultural herbicide that reaches water through runoff. | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Benzene | Not detected UG/LHighest single sampleSource water | 1 UG/LMCL | None detected |
| Benzo(a)pyrene | Not detected UG/LHighest single sampleSource water | 0.2 UG/LMCL | None detected |
| Dalapon | Not detected UG/LHighest single sampleSource water | 200 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 |
| Simazine | Not detected UG/LHighest single sampleSource water | 4 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 |
People also ask about Mesa Del Toro Mwc, CA's water
+Is Mesa Del Toro Mwc, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Mesa Del Toro Mwc, CA water utility lists 5 contaminants at or above the federal limit: Manganese, Iron, Color, Arsenic, and 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 Mesa Del Toro Mwc, CA tap water?
71 contaminants were measured in Mesa Del Toro Mwc, CA's 2023 Consumer Confidence Report, spanning other, metals, and vocs & pesticides. 63 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 Mesa Del Toro Mwc, CA tap water?
5 contaminants in Mesa Del Toro Mwc, CA's 2023 report sit at or above the federal limit: Manganese (11.4× the limit); Iron (7.8× the limit); Color (1.9× the limit); Arsenic (1.4× the limit); Turbidity (1.3× 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 Mesa Del Toro Mwc, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Manganese, at 11.4× the federal threshold. It belongs to the metals family of contaminants.
+Are any contaminants in Mesa Del Toro Mwc, CA tap water approaching the federal limit?
2 contaminants are between 80% and 100% of the federal limit in this report: Total Dissolved Solids and Specific Conductance. 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 Mesa Del Toro Mwc, 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 Mesa Del Toro Mwc, 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.