Drinking water quality · 2023
· Verified
What's in Santa Fe I.d. — Rancho Santa Fe, Ca, CA tap water
36 contaminants were measured in the Santa Fe I.d. — Rancho Santa Fe, 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
- 36
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- Chlorine
- Service area
- CA
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0–10 mg/LRangeSystem-wide | None set | At or above the limit |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 2.4–2.8 ng/LRangeSystem-wide | 4 ng/LMCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.83 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 0–1.5 ug/LRangeSystem-wide | None set | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 75–110 ug/LRangeSystem-wide | 2000 ug/LMCL | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0 ug/L90th percentileAt the tap | None set | Within the limit |
+By source (2)— No. of samples collected, No. of Schools Requesting Lead Sampling
| |||
| AluminumA common element sometimes used as a treatment coagulant. | 0–46 ug/LRangeSystem-wide | None set | Detected — no federal limit |
| BoronA naturally occurring element from rock and soil. | 0.13 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 65 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0.02–0.048 ug/LRangeSystem-wide | None set | Detected — no federal limit |
| LithiumA naturally occurring element found in some groundwater. | 30.6 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 27.75 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 5.2 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| Vanadium | 1.03 ug/LAverageSystem-wide | None set | Detected — no federal limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorite | 0.39–0.6 mg/LRangeSystem-wide | 1 mg/LMCL | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 3.5–20 ug/LRangeSystem-wide | None set | Within the limit |
| BromodichloromethaneA trihalomethane disinfection byproduct. | 13.96 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| BromoformA trihalomethane disinfection byproduct. | 4.2 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| ChlorateA byproduct that can form during disinfection, especially when hypochlorite solutions degrade. | 459 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| ChloroformA trihalomethane formed when chlorine reacts with organic matter in water. | 11.5 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| DibromochloromethaneA trihalomethane disinfection byproduct. | 14.14 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 0.84 ug/LReported levelSystem-wide | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.59 pCi/LReported levelSystem-wide | 5 pCi/LMCL | Within the limit |
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0.2–0.34 pCi/LRangeSystem-wide | 15 pCi/LMCL | Within the limit |
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 6.01–7.7 pCi/LRangeSystem-wide | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Bromochloroacetic acidA mixed-halogen haloacetic acid disinfection byproduct. | 6.3 ug/LAverageSystem-wide | None set | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.27–0.33 mg/LRangeSystem-wide | 4 mg/LMCL | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0–0.75 mg/LRangeSystem-wide | 10 mg/LMCL | Within the limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 3Highest single sampleNo. of Detections | None set | Detected — no federal limit |
Other
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AlkalinityA measure of the water's capacity to neutralize acids. | 125 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| Bicarbonate | 125 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 162.5 mg/LAverageSystem-wide | None set | Detected — no federal limit |
People also ask about Santa Fe I.d. — Rancho Santa Fe, Ca, CA's water
+Is Santa Fe I.d. — Rancho Santa Fe, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Santa Fe I.d. — Rancho Santa Fe, Ca, CA water utility lists 1 contaminant at or above the federal limit: Chlorine. 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 Santa Fe I.d. — Rancho Santa Fe, Ca, CA tap water?
36 contaminants were measured in Santa Fe I.d. — Rancho Santa Fe, Ca, CA's 2023 Consumer Confidence Report, spanning metals, disinfection byproducts, and other. 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 Santa Fe I.d. — Rancho Santa Fe, Ca, CA tap water?
One contaminant in Santa Fe I.d. — Rancho Santa Fe, Ca, CA's 2023 report sits at or above the federal limit: Chlorine (2.5× 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 Santa Fe I.d. — Rancho Santa Fe, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Chlorine, at 2.5× the federal threshold. It belongs to the disinfectants family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Santa Fe I.d. — Rancho Santa Fe, 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 Santa Fe I.d. — Rancho Santa Fe, 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.