Drinking water quality · 2023
· Verified
What's in Slocsa #10a - Cayucos — San Luis Obispo, Ca, CA tap water
14 contaminants were measured in the Slocsa #10a - Cayucos — San Luis Obispo, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit.
- Reporting year
- 2023
- Contaminants measured
- 14
- Over federal limit
- 0
- Approaching the limit
- 1
- Service area
- CA
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| SeleniumA trace element from natural deposits and industrial discharge. | 48 ug/LAverageSystem-wide | None set | Approaching the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 2.2 ug/LAverageSystem-wide | None set | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 270 ug/L90th percentileAt the tap | 1300 ug/LAction level | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.82 ug/L90th percentileAt the tap | None set | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.069 mg/LAverageSystem-wide | 2 mg/LMCL | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | 0.078 mg/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. | 21 ug/LAverageSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 5.6 ug/LAverageSystem-wide | None set | Within the limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.98 mg/LAverageSystem-wide | None set | Within the limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 3.4 pCi/LAverageSystem-wide | 15 pCi/LMCL | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.29 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.05 NTUAverageSystem-wide | None set | Within the limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | Not detectedRangeRange Detected | None set | None detected |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | Not detected ug/LAverageSystem-wide | None set | None detected |
People also ask about Slocsa #10a - Cayucos — San Luis Obispo, Ca, CA's water
+Is Slocsa #10a - Cayucos — San Luis Obispo, Ca, CA tap water safe to drink in 2023?
Every one of the 14 contaminants measured in Slocsa #10a - Cayucos — San Luis Obispo, Ca, CA's 2023 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 Slocsa #10a - Cayucos — San Luis Obispo, Ca, CA tap water?
14 contaminants were measured in Slocsa #10a - Cayucos — San Luis Obispo, Ca, CA's 2023 Consumer Confidence Report, spanning metals, disinfection byproducts, and disinfectants. 4 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Are any contaminants in Slocsa #10a - Cayucos — San Luis Obispo, Ca, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Selenium. 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 Slocsa #10a - Cayucos — San Luis Obispo, 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 Slocsa #10a - Cayucos — San Luis Obispo, 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.