Drinking water quality · 2023
· Verified
What's in Vallecitos Wd — San Marcos, Ca, CA tap water
23 contaminants were measured in the Vallecitos Wd — San Marcos, Ca, 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
- 23
- Over federal limit
- 1
- Approaching the limit
- 2
- Worst contaminant
- Turbidity
- Service area
- CA
1.8× the limit
state-level CCR
At or above the federal limit
Approaching the limit (≥ 80%)
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.1–1.8 NTUReported levelWeese Treatment Plant | 1 NTUMCL | At or above the limit |
+By source (5)— Weese Treatment Plant, Carlsbad Desalination Plant, Twin Oaks Treatment Plant +2 more
| |||
| ColorA measure of visible tint in the water. | 0–3Reported levelWeese Treatment Plant | None set | Detected — no federal limit |
+By source (5)— Weese Treatment Plant, Skinner Treatment Plant, Olivenhain Treatment Plant +2 more
| |||
| OdorA measure of detectable smell in the water. | 0–3Reported levelWeese Treatment Plant | None set | Detected — no federal limit |
+By source (5)— Weese Treatment Plant, Olivenhain Treatment Plant, Skinner Treatment Plant +2 more
| |||
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 653–1070Reported levelWeese Treatment Plant | None set | Detected — no federal limit |
+By source (5)— Weese Treatment Plant, Skinner Treatment Plant, Olivenhain Treatment Plant +2 more
| |||
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 474–614 mg/LReported levelTwin Oaks Treatment Plant | None set | Detected — no federal limit |
+By source (5)— Twin Oaks Treatment Plant, Skinner Treatment Plant, Olivenhain Treatment Plant +2 more
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 0–8.5 ug/LReported levelTwin Oaks Treatment Plant | None set | Approaching the limit |
+By source (2)— Twin Oaks Treatment Plant, Skinner Treatment Plant
| |||
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 0–27 ug/LReported levelWithin VWD's System | None set | Within the limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Total | 0.3–3.4 mg/LReported levelWithin VWD's System | None set | Approaching the limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0–4 pCi/LReported levelSkinner Treatment Plant | 15 pCi/LMCL | Within the limit |
+By source (4)— Skinner Treatment Plant, Weese Treatment Plant, Twin Oaks Treatment Plant +1 more
| |||
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 0–5 pCi/LReported levelSkinner Treatment Plant | None set | Detected — no federal limit |
+By source (3)— Skinner Treatment Plant, Twin Oaks Treatment Plant, Carlsbad Desalination Plant
| |||
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 0–3 pCi/LReported levelSkinner Treatment Plant | 20 pCi/LMCL | Detected — no federal limit |
+By source (5)— Skinner Treatment Plant, Twin Oaks Treatment Plant, Weese Treatment Plant +2 more
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 2.2 ug/LReported levelOlivenhain Treatment Plant | None set | Within the limit |
+By source (4)— Olivenhain Treatment Plant, Skinner Treatment Plant, Carlsbad Desalination Plant +1 more
| |||
| CopperA metal that enters water from corroding household plumbing. | 0.25 mg/LReported levelWithin VWD's System | 1.3 mg/LAction level | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 1.7 ug/LReported levelWithin VWD's System | None set | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.095–0.122 mg/LReported levelTwin Oaks Treatment Plant | 2 mg/LMCL | Within the limit |
+By source (5)— Twin Oaks Treatment Plant, Olivenhain Treatment Plant, Weese Treatment Plant +2 more
| |||
| ManganeseA naturally occurring metal from soil and rock. | Not detected ug/LReported levelTwin Oaks Treatment Plant | None set | None detected |
+By source (3)— Twin Oaks Treatment Plant, Carlsbad Desalination Plant, Skinner Treatment Plant
| |||
| AluminumA common element sometimes used as a treatment coagulant. | 0–160 ug/LReported levelTwin Oaks Treatment Plant | None set | Detected — no federal limit |
+By source (4)— Twin Oaks Treatment Plant, Skinner Treatment Plant, Weese Treatment Plant +1 more
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.6–0.8 mg/LReported levelCarlsbad Desalination Plant | 4 mg/LMCL | Within the limit |
+By source (4)— Carlsbad Desalination Plant, Olivenhain Treatment Plant, Skinner Treatment Plant +1 more
| |||
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | Not detected mg/LReported levelWeese Treatment Plant | 10 mg/LMCL | None detected |
+By source (3)— Weese Treatment Plant, Skinner Treatment Plant, Carlsbad Desalination Plant
| |||
| ChlorideA naturally occurring salt compound. | 48–110 mg/LReported levelCarlsbad Desalination Plant | None set | Detected — no federal limit |
+By source (4)— Carlsbad Desalination Plant, Weese Treatment Plant, Skinner Treatment Plant +1 more
| |||
| SulfateA naturally occurring mineral from rock and soil. | 152–217 mg/LReported levelTwin Oaks Treatment Plant | None set | Detected — no federal limit |
+By source (5)— Twin Oaks Treatment Plant, Weese Treatment Plant, Skinner Treatment Plant +2 more
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0Reported levelCarlsbad Desalination Plant | 0Public health goal | None detected |
+By source (3)— Carlsbad Desalination Plant, Skinner Treatment Plant, Twin Oaks Treatment Plant
| |||
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0 %Reported levelSkinner Treatment Plant | None set | None detected |
+By source (5)— Skinner Treatment Plant, Twin Oaks Treatment Plant, Carlsbad Desalination Plant +2 more
| |||
Source: Vallecitos Wd — San Marcos, Ca, 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 Vallecitos Wd — San Marcos, Ca, CA's water
+Is Vallecitos Wd — San Marcos, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Vallecitos Wd — San Marcos, 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 Vallecitos Wd — San Marcos, Ca, CA tap water?
23 contaminants were measured in Vallecitos Wd — San Marcos, Ca, CA's 2023 Consumer Confidence Report, spanning metals, physical & aggregate, and inorganic chemicals. 8 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 Vallecitos Wd — San Marcos, Ca, CA tap water?
One contaminant in Vallecitos Wd — San Marcos, Ca, CA's 2023 report sits at or above the federal limit: Turbidity (1.8× 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 Vallecitos Wd — San Marcos, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Turbidity, at 1.8× the federal threshold. It belongs to the physical & aggregate family of contaminants.
+Are any contaminants in Vallecitos Wd — San Marcos, Ca, CA tap water approaching the federal limit?
2 contaminants are between 80% and 100% of the federal limit in this report: Bromate and Chlorine Total. 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 Vallecitos Wd — San Marcos, Ca, 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 Vallecitos Wd — San Marcos, 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 2023 report; a new report will replace it once the utility publishes its next annual update.
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