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Tap water quality report

Dublin San Ramon Services District

EPA monitoring tested this supplier for 42 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

42
contaminants tested
10
detected
98,776
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Local government
Counties served
Alameda

Compliance record

No violations on file. The EPA has no formal drinking-water violations recorded for this supplier.

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
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 45/45 LCR 2025
Total Haloacetic Acids (HAA5)
10.54 µg/L 18%
of the EPA limit 60 µg/L
worst single sample: 13 µg/L
25/32 SYR4 2019
Chloroform
12.725 µg/L
No EPA limit set
worst single sample: 13.2 µg/L
20/31 SYR4 2019
TTHM
23.73 µg/L 30%
of the EPA limit 80 µg/L
worst single sample: 24.3 µg/L
20/31 SYR4 2019
Bromodichloromethane
7.615 µg/L
No EPA limit set
worst single sample: 7.7 µg/L
18/31 SYR4 2019
Dibromochloromethane
3.4 µg/L
No EPA limit set
 17/31 SYR4 2019
Dichloroacetic Acid
4.86 µg/L
No EPA limit set
worst single sample: 5 µg/L
15/32 SYR4 2019
Dibromoacetic Acid
5.9 µg/L
No EPA limit set
worst single sample: 6.2 µg/L
13/32 SYR4 2019
Trichloroacetic Acid
2.3 µg/L
No EPA limit set
 10/32 SYR4 2019
Bromoform
2.008 µg/L
No EPA limit set
worst single sample: 2.01 µg/L
5/31 SYR4 2019
32 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaHfpo-DaMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact
WARD, DANNY
Phone
925-875-2371
Email
[email protected]

Frequently asked questions about Dublin San Ramon Services District

Is Dublin San Ramon Services District tap water safe to drink?

EPA monitoring detected 10 contaminants in Dublin San Ramon Services District'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 Dublin San Ramon Services District's water?

EPA monitoring detected Lead, Total Haloacetic Acids (HAA5), Chloroform, TTHM, Bromodichloromethane, and others. The full list with the level and data source for each is above.

How many people does Dublin San Ramon Services District serve?

Dublin San Ramon Services District reports serving 98,776 people in California, per its EPA record.

Has Dublin San Ramon Services District had any water quality violations?

The EPA has no formal drinking-water violations on file for Dublin San Ramon Services District.

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.