Drinking water quality · 2023
· Verified
What's in Lake Arrowhead Csd — Lake Arrowhead, Ca, CA tap water
26 contaminants were measured in the Lake Arrowhead Csd — Lake Arrowhead, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 2 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 26
- Over federal limit
- 2
- Approaching the limit
- 1
- Worst contaminant
- PFOA
- Service area
- CA
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 13.75 ng/LAverageLacsd | 5.1 ng/LNL | At or above the limit |
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 6.1 ng/LAverageLacsd | 6.5 ng/LNL | At or above the limit |
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 2.8 ng/LAverageLacsd | 3 ng/LNL | Within the limit |
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | 5.05 ng/LAverageLacsd | 500 ng/LNL | Detected — no federal limit |
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | 5.4 ng/LAverageLacsd | None set | Detected — no federal limit |
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | 5.45 ng/LAverageLacsd | 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. | 65.9 ug/LAverageLacsd | None set | Approaching the limit |
+By source (2)— Lacsd, Clawa
| |||
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 25.7 ug/LAverageLacsd | None set | Within the limit |
+By source (2)— Lacsd, Clawa
| |||
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 1.47 mg/LAverageLacsd | 4 mg/LMCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.26 mg/L90th percentileLacsd | 1.3 mg/LAction level | Within the limit |
+By source (2)— Lacsd, Clawa
| |||
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 1.9 ug/L90th percentileClawa | None set | Within the limit |
+By source (2)— Clawa, Lacsd
| |||
| BoronA naturally occurring element from rock and soil. | 100 ug/LAverageClawa | None set | Detected — no federal limit |
+By source (2)— Clawa, Lacsd
| |||
| CalciumA naturally occurring mineral that contributes to water hardness. | 26 mg/LAverageLacsd | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 5 mg/LAverageLacsd | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 2.2 mg/LAverageLacsd | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 51.38 mg/LAverageClawa | None set | Detected — no federal limit |
+By source (2)— Clawa, Lacsd
| |||
| Vanadium | 3.09 ug/LAverageClawa | None set | Detected — no federal limit |
+By source (2)— Clawa, Lacsd
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 2.92 pCi/LAverageLacsd | 15 pCi/LMCL | Within the limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 0.02 pCi/LAverageLacsd | 20 pCi/LMCL | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.21 mg/LAverageClawa | 10 mg/LMCL | Within the limit |
+By source (2)— Clawa, Lacsd
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0–0 mg/LRangeClawa | 4 mg/LMCL | None detected |
+By source (2)— Clawa, Lacsd
| |||
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Bicarbonate | 100 mg/LAverageLacsd | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 87.69 mg/LAverageClawa | None set | Detected — no federal limit |
+By source (2)— Clawa, Lacsd
| |||
| pHA measure of how acidic or basic the water is. | 8.06AverageClawa | None set | Detected — no federal limit |
+By source (2)— Clawa, Lacsd
| |||
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 2.2AverageLacsd | None set | Detected — no federal limit |
| TurbidityA measure of cloudiness from suspended particles in the water. | 100AverageClawa | None set | Detected — no federal limit |
+By source (2)— Clawa, Lacsd
| |||
People also ask about Lake Arrowhead Csd — Lake Arrowhead, Ca, CA's water
+Is Lake Arrowhead Csd — Lake Arrowhead, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Lake Arrowhead Csd — Lake Arrowhead, Ca, CA water utility lists 2 contaminants at or above the federal limit: PFOA and PFOS. 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 Lake Arrowhead Csd — Lake Arrowhead, Ca, CA tap water?
26 contaminants were measured in Lake Arrowhead Csd — Lake Arrowhead, Ca, CA's 2023 Consumer Confidence Report, spanning metals, pfas ("forever chemicals"), and physical & aggregate. 10 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 Lake Arrowhead Csd — Lake Arrowhead, Ca, CA tap water?
2 contaminants in Lake Arrowhead Csd — Lake Arrowhead, Ca, CA's 2023 report sit at or above the federal limit: PFOA (3.4× the limit); PFOS (1.5× 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 Lake Arrowhead Csd — Lake Arrowhead, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is PFOA, at 3.4× the federal threshold. It belongs to the pfas ("forever chemicals") family of contaminants.
+Are any contaminants in Lake Arrowhead Csd — Lake Arrowhead, Ca, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: TTHM. 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 Lake Arrowhead Csd — Lake Arrowhead, 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 Lake Arrowhead Csd — Lake Arrowhead, 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.