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Public water system record

East Valley Water District

Serves Highland and San Bernardino, San Bernardino County, CA · 108,629 people served

Federal records show 3 health-based violations and no monitoring/reporting issues for East Valley Water District in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.

  • CA3610064
  • HIGHLAND
  • CA
  • 108,629 served

System profile

Source water Surface water
ZIP 92346
EPA system ID CA3610064

Verify this system on EPA ECHO →

Health-based violations, last 10 years
3
Resolved
3
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
0

Key facts

  • East Valley Water District draws water from 13 wells and 3 surface water intakes.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.092 mg/L, federal limit 0.08 mg/L (1.2 times the limit), 2017.
  • Most recent formal enforcement: compliance order (no penalty) by California, April 2017.
  • Lead pipe inventory: 0 lead and 0 unknown out of 22,300 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jan 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jan 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.092 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Jan 1, 2017 Resolved No

Enforcement actions

California regulators took 1 formal enforcement action against East Valley Water District in 2017. The most recent was a compliance order (no penalty) in April 2017.

Date By Action Violations covered
Apr 10, 2017 California Compliance order (no penalty) 3 violations (3 health-based): Total Trihalomethanes (TTHMs)

What the violations mean

Total Trihalomethanes (TTHMs)

3 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

East Valley Water District draws water from 13 wells and 3 surface water intakes. It also has an emergency connection to San Bernardino City.

Emergency or part-time connections to

Annual water quality report

East Valley Water District must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by California.

Certified drinking water labs by state EPA guidance for private wells