Drinking water quality · 2025
· Verified
What's in Rincon Del Diablo MWD (id-1), CA tap water
15 contaminants were measured in the Rincon Del Diablo MWD (id-1), CA water system's 2025 annual report. Each is shown below against its federal limit.
- Reporting year
- 2025
- Contaminants measured
- 15
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
PFAS — EPA UCMR5 (2023–2025)
2 PFAS compounds detected in Rincon Del Diablo MWD (id-1), CA
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFBA
● Detected (no federal limit)near national p90 (18 ng/L across detecting U.S. systems)
Lithium
● Detected (no federal limit)near national p90 (76.59999999999991 mg/L across detecting U.S. systems)
Where your water comes from · EPA SDWIS
Rincon Del Diablo MWD (id-1), CA buys its drinking water from ESCONDIDO, CITY OF, SAN DIEGO COUNTY WATER AUTHORITY.
Source
Treatment
Distribution
Also buys water from ESCONDIDO, CITY OF, SAN DIEGO COUNTY WATER AUTHORITY.
Historical readings · EPA Six-Year Review (2012–2019)
11 historically-detected contaminants in Rincon Del Diablo MWD (id-1), 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) |
|---|---|---|---|
TTHM worst: 2014 | 0.046 mg/L within | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
HAA5 worst: 2015 | 0.03 mg/L within | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
DBAA worst: 2012 | 0.0033 mg/L | — | '12'13'14'15'16'17'18'19 |
DCAA worst: 2012 | 0.0032 mg/L | — | '12'13'14'15'16'17'18'19 |
MBAA worst: 2014 | 0.0031 mg/L | — | '14'15 |
MCAA worst: 2013 | 0.0046 mg/L | — | '13'14'15'16'17'19 |
TCAA worst: 2012 | 0.0016 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMODICHLOROMETHANE worst: 2012 | 0.0049 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMOFORM worst: 2012 | 0.0065 mg/L | — | '12'13'14'15'16'17'18'19 |
CHLOROFORM worst: 2012 | 0.0029 mg/L | — | '12'13'14'15'16'17'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.0084 mg/L | — | '12'13'14'15'16'17'18'19 |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 401 UG/L90th percentileDistribution | 1300 UG/LAl | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 1.5366666666666666 UG/LAverageDistribution | None set | Detected — no federal limit |
People also ask about Rincon Del Diablo MWD (id-1), CA's water
+Is Rincon Del Diablo MWD (id-1), CA tap water safe to drink in 2025?
Every one of the 15 contaminants measured in Rincon Del Diablo MWD (id-1), CA's 2025 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 Rincon Del Diablo MWD (id-1), CA tap water?
15 contaminants were measured in Rincon Del Diablo MWD (id-1), CA's 2025 Consumer Confidence Report, spanning disinfection byproducts, other, and metals. 3 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 Rincon Del Diablo MWD (id-1), CA's 2025 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 Rincon Del Diablo MWD (id-1), 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 2025 report; a new report will replace it once the utility publishes its next annual update.