Drinking water quality · 2024
· Verified
What's in Mesa Del Toro Mwc, CA tap water
40 contaminants were measured in the Mesa Del Toro Mwc, CA water system's 2024 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 40
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- Manganese
- Service area
- CA
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
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ManganeseA naturally occurring metal from soil and rock. | 493.6666666666667 UG/LAverageSource water | 50 UG/LMCL | At or above the limit |
| CopperA metal that enters water from corroding household plumbing. | 907.2 UG/L90th percentileDistribution | 1300 UG/LAl | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | 93 ug/LAverageWeymouth | 200 ug/LMCL | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.124 mg/LAverageWeymouth | 1 mg/LMCL | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | Not detected ug/LAverageAverage Amount | 10 ug/LMCL | Within the limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | Not detected UG/LHighest single sampleSource water | 10 UG/LMCL | None detected |
| BoronA naturally occurring element from rock and soil. | 0.2 mg/LAverageAverage Amount | None set | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 68 mg/LAverageWeymouth | None set | Detected — no federal limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 1.675 UG/LAverageDistribution | None set | Detected — no federal limit |
| LithiumA naturally occurring element found in some groundwater. | 22 ug/LAverageAverage Amount | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 26 mg/LAverageWeymouth | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 5 mg/LAverageWeymouth | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 105 mg/LAverageWeymouth | None set | Detected — no federal limit |
| Vanadium | 4.5 ug/LAverageAverage Amount | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 1269 UMHO/CMAverageSource water | 1600 UMHO/CMMCL | Within the limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 776.6666666666666 MG/LAverageSource water | 1000 MG/LMCL | Within the limit |
| OdorA measure of detectable smell in the water. | 1AverageDiemer | 3MCL | Within the limit |
| ColorA measure of visible tint in the water. | 2AverageDiemer | 15MCL | Within the limit |
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.12 NTUAverageAverage Amount | 5 NTUMCL | Within the limit |
| AlkalinityA measure of the water's capacity to neutralize acids. | 143 mg/LAverageAverage Amount | None set | Detected — no federal limit |
| Bicarbonate | 163 mg/LAverageAverage Amount | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 272 mg/LAverageWeymouth | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 8.2AverageDiemer | None set | Detected — no federal limit |
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 2.4 mg/LAverageDiemer | None set | Detected — no federal limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 2.11 mg/LAverageAverage Amount | 4 mg/LMCL | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| SulfateA naturally occurring mineral from rock and soil. | 225 mg/LAverageWeymouth | 500 mg/LMCL | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.7 mg/LAverageWeymouth | 2 mg/LMCL | Within the limit |
| ChlorideA naturally occurring salt compound. | 106 mg/LAverageWeymouth | 500 mg/LMCL | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | Not detected MG/LHighest single sampleSource water | 10 MG/LMCL | None detected |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 19 ug/LAverageAverage Amount | 80 ug/LMCL | Within the limit |
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 2 ug/LAverageWeymouth | 10 ug/LMCL | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 3 ug/LAverageAverage Amount | 60 ug/LMCL | Within the limit |
| NDMA | Not detected ng/LRangeSystem-wide | 3 ng/LPublic health goal | 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 |
| ChlorateA byproduct that can form during disinfection, especially when hypochlorite solutions degrade. | 80 ug/LAverageWeymouth | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 4 pCi/LAverageDiemer | 50 pCi/LMCL | Within the limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 1 pCi/LAverageDiemer | 20 pCi/LMCL | Within the limit |
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | Not detected pCi/LAverageAverage Amount | 5 pCi/LMCL | Within the limit |
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | Not detected pCi/LAverageDiemer | 15 pCi/LMCL | Within the limit |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 1,2,3-TCP | Not detected UG/LHighest single sampleSource water | 0.005 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 2024?
The 2024 Consumer Confidence Report for the Mesa Del Toro Mwc, CA water utility lists 1 contaminant at or above the federal limit: Manganese. 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?
40 contaminants were measured in Mesa Del Toro Mwc, CA's 2024 Consumer Confidence Report, spanning metals, physical & aggregate, and disinfection byproducts. 26 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?
One contaminant in Mesa Del Toro Mwc, CA's 2024 report sits at or above the federal limit: Manganese (9.9× 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 2024 report is Manganese, at 9.9× 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 Mesa Del Toro Mwc, CA's 2024 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 2024 report; a new report will replace it once the utility publishes its next annual update.