Drinking water quality · 2026
· Verified
What's in Rancho Estates Mutual Water Co., CA tap water
4 contaminants were measured in the Rancho Estates Mutual Water Co., CA water system's 2026 annual report. Each is shown below against its federal limit.
- Reporting year
- 2026
- Contaminants measured
- 4
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
Where your water comes from · EPA SDWIS
Rancho Estates Mutual Water Co., CA's drinking water comes from ground water, drawn from 4 sources.
Source
- WELL · 4
Treatment
- WELL 08 DISINFECTION
- NITRATAX BLENDING MONITOR
- WELL 12 DISINFECTION
Distribution
Also buys water from YUIMA MUNICIPAL WATER DISTRICT.
Historical readings · EPA Six-Year Review (2012–2019)
3 contaminants historically over EPA limits in Rancho Estates Mutual Water Co., CA
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
THALLIUM worst: 2012 | 0.038 mg/L 19.0× | 0.002 mg/L | '12 |
NITRATE worst: 2019 | 17 mg/L 1.7× | 10 mg/L | '12'13'14'15'16'17'18'19 |
ANTIMONY worst: 2014 | 0.0065 mg/L 1.1× above national p90 | 0.006 mg/L | '12'14 |
SELENIUM worst: 2012 | 0.04 mg/L within | 0.05 mg/L | '12'17'18 |
ARSENIC worst: 2012 | 0.0071 mg/L within near national p90 | 0.01 mg/L | '12'17'18 |
FLUORIDE worst: 2014 | 0.85 mg/L within | 4 mg/L | '12'14'17'18 |
BARIUM worst: 2014 | 0.084 mg/L within below national p90 | 2 mg/L | '12'14'17'18 |
URANIUM worst: 2019 | 0.116 ug/L within 5.5× the national p90 | 30 ug/L | '13'16'17'18'19 |
TOLUENE worst: 2017 | 0.0036 mg/L within | 1 mg/L | '17 |
LEAD worst: 2012 | 0.18 mg/L | — | '12 |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Nitrate Nitrite | 4.7275 MG/LAverageSource water | 10 MG/LMCL | Within the limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 1.8 UG/LAverageSource water | 6 UG/LMCL | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitriteA compound from fertilizer runoff, sewage, and erosion of natural deposits. | Not detected MG/LHighest single sampleSource water | 1 MG/LMCL | None detected |
People also ask about Rancho Estates Mutual Water Co., CA's water
+Is Rancho Estates Mutual Water Co., CA tap water safe to drink in 2026?
Every one of the 4 contaminants measured in Rancho Estates Mutual Water Co., CA's 2026 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 Rancho Estates Mutual Water Co., CA tap water?
4 contaminants were measured in Rancho Estates Mutual Water Co., CA's 2026 Consumer Confidence Report, spanning inorganic chemicals, disinfection byproducts, and other. 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.
+Where does the data on this page come from?
Every value is transcribed from Rancho Estates Mutual Water Co., CA's 2026 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 Rancho Estates Mutual Water Co., 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 2026 report; a new report will replace it once the utility publishes its next annual update.