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Rincon Del Diablo Mwd (Id-A)

EPA monitoring tested this supplier for 12 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

12
contaminants tested
12
detected
3,275
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Local government
Counties served
San Diego

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

0
health-based violations
2
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2001-09-01
MR Monitoring Resolved 2001-09-01

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Bromodichloromethane
28.5 µg/L
No EPA limit set
worst single sample: 31 µg/L
51/51 SYR4 2012–2019
Bromoform
9.4 µg/L
No EPA limit set
worst single sample: 10.6 µg/L
51/51 SYR4 2012–2019
Chloroform
27.5 µg/L
No EPA limit set
worst single sample: 30 µg/L
51/51 SYR4 2012–2019
Dibromochloromethane
21.05 µg/L
No EPA limit set
worst single sample: 22 µg/L
51/51 SYR4 2012–2019
Dichloroacetic Acid
11 µg/L
No EPA limit set
worst single sample: 19 µg/L
51/51 SYR4 2012–2019
TTHM
79.5 µg/L 99%
of the EPA limit 80 µg/L
worst single sample: 86 µg/L
51/51 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
37.5 µg/L 63%
of the EPA limit 60 µg/L
worst single sample: 48 µg/L
51/51 SYR4 2012–2019
Trichloroacetic Acid
8.2 µg/L
No EPA limit set
worst single sample: 12 µg/L
51/51 SYR4 2012–2019
Dibromoacetic Acid
6.52 µg/L
No EPA limit set
worst single sample: 7.3 µg/L
49/51 SYR4 2012–2019
Monochloroacetic Acid
30.25 µg/L
No EPA limit set
worst single sample: 35 µg/L
20/51 SYR4 2012–2019
Monobromoacetic Acid
2.76 µg/L
No EPA limit set
worst single sample: 2.8 µg/L
9/51 SYR4 2012–2019
Lead
0.0033 mg/L 22%
of the EPA limit 0.0150 mg/L
 8/8 LCR 2026

Utility contact

Contact
UMBRASAS, JEFF
Phone
760-745-5522
Email
[email protected]

Frequently asked questions about Rincon Del Diablo Mwd (Id-A)

Is Rincon Del Diablo Mwd (Id-A) tap water safe to drink?

EPA monitoring detected 12 contaminants in Rincon Del Diablo Mwd (Id-A)'s water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Rincon Del Diablo Mwd (Id-A)'s water?

EPA monitoring detected Bromodichloromethane, Bromoform, Chloroform, Dibromochloromethane, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Rincon Del Diablo Mwd (Id-A) serve?

Rincon Del Diablo Mwd (Id-A) reports serving 3,275 people in California, per its EPA record.

Has Rincon Del Diablo Mwd (Id-A) had any water quality violations?

The EPA has 2 violations on file for Rincon Del Diablo Mwd (Id-A), of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.