Drinking water quality · 2020
· Verified
What's in Llano Mutual Water Company, CA tap water
11 contaminants were measured in the Llano Mutual Water Company, CA water system's 2020 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2020
- Contaminants measured
- 11
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- Lead
- Service area
- CA
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.
- Treatment technique violationHealth-based1 violation on record · most recent Oct 20241 open
- Reporting1 violation on record · most recent Oct 20241 open
- Monitoring1 violation on recordresolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.018 mg/L90th percentileAt the tap | 0.015 mg/LAction level | At or above the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.15 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 75–82RangeSystem-wide | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 22–24RangeSystem-wide | 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 detectedReported levelSystem-wide | None set | None detected |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Asbestos | Not detectedReported levelSystem-wide | None set | None detected |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | Not detectedReported levelSystem-wide | 10MCL | None detected |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.35–0.37RangeSystem-wide | 2MCL | Detected — no federal limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0Highest single sampleNo. of Detections | None set | None detected |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0Highest single sampleNo. of Detections | None set | None detected |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Nitrate Nitrite | Not detectedReported levelSystem-wide | 10MCL | None detected |
People also ask about Llano Mutual Water Company, CA's water
+Is Llano Mutual Water Company, CA tap water safe to drink in 2020?
The 2020 Consumer Confidence Report for the Llano Mutual Water Company, CA water utility lists 1 contaminant at or above the federal limit: Lead. 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 Llano Mutual Water Company, CA tap water?
11 contaminants were measured in Llano Mutual Water Company, CA's 2020 Consumer Confidence Report, spanning metals, inorganic chemicals, and microbial. 5 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 Llano Mutual Water Company, CA tap water?
One contaminant in Llano Mutual Water Company, CA's 2020 report sits at or above the federal limit: Lead (1.2× 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 Llano Mutual Water Company, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2020 report is Lead, at 1.2× 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 Llano Mutual Water Company, CA's 2020 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 Llano Mutual Water Company, 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 2020 report; a new report will replace it once the utility publishes its next annual update.