Drinking water quality · 2023
· Verified
· PWSID CA4010901
What's in Slocsa #10a - Cayucos — San Luis Obispo, Ca, CA tap water
Every one of the 12 core regulated contaminants reported for Slocsa #10a - Cayucos — San Luis Obispo, Ca, CA came in below its federal limit.
- !1 contaminant within 20% of a limit
- !12 of 27 core regulated contaminants reported — 15 never appear in this report
- ✓Nothing over a federal limit
- ✓No open federal violations
+How this score is calculated
Every system starts at 100. Points come off for measured levels, for the federal violation record, and for how much of the core regulated set the utility actually reported. All three inputs are the utility's own published numbers and EPA's own records.
- −0 contaminants at or above a federal limit
- −4 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −0 health-based violations resolved in the last 5 years
- −11 core regulated contaminants never reported (12/27)
A 90–100 · B 80–89 · C 70–79 · D 60–69 · F below 60. A system reporting under a third of the core set is capped at C however clean its numbers look — a short report is not a clean bill of health.
Full grading methodology, constant for constant →What to worry about
- Selenium96% of the federal limit48 ug/L · limit 50 ug/L
Essential in tiny amounts, but long-term exposure above the federal limit can cause hair and fingernail loss and circulatory problems.
Higher than 95% of CA systems that report it · higher than 95% of U.S. systems
+13 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| TTHM | 21 ug/L | 80 ug/L |
| Chlorine | 0.98 mg/L | 4 mg/L |
| Gross Alpha | 3.4 pCi/L | 15 pCi/L |
| Arsenic | 2.2 ug/L | 10 ug/L |
| Copper | 270 ug/L | 1300 ug/L |
| HAA5 | 5.6 ug/L | 60 ug/L |
| Fluoride | 0.29 mg/L | 4 mg/L |
| Turbidity | 0.05 NTU | 1 NTU |
| Barium | 0.069 mg/L | 2 mg/L |
| Aluminum | 0.078 mg/L | — |
| Lead | 0.0 mg/L | 0.015 mg/L |
| Total Coliform | Not detected | — |
| Chromium | Not detected ug/L | 100 ug/L |
What this report doesn't tell you
15 of the 27 contaminants a community water system normally reports do not appear anywhere in Slocsa #10a - Cayucos — San Luis Obispo, Ca, CA's data. Absent is not the same as absent-from-the-water — it means nobody published a number.
+Full detail: PFAS testing, water source, historical monitoring, and the federal violation record
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.