San Bernardino City
As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.
CA / San Bernardino
CA · Tap water records
San Bernardino tap water, in plain English
Here is what the EPA's own data shows about tap water in San Bernardino. According to EPA SDWIS data retrieved June 2026, San Bernardino is served by 12 active community water systems, together reported to serve about 377,910 people.
As of June 2026, EPA records show 551 violations across the community water system(s) serving San Bernardino, going back to the earliest EPA record. 476 of these are classified by the EPA as health-based (a contaminant recorded above the limit the EPA tracks); the rest are monitoring or reporting violations. Each is listed by system below, with its status.
- 12Community water systems
- ~377,910People served (EPA-reported)
- June 2026EPA records reviewed through
What the EPA has on record, by system
San Bernardino Valley Wd
As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.
Sbdno County Service Area 64
- Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times in January 2020. All have since returned to compliance, per EPA records.
- Monitoring Lead and Copper Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in October 2012. All have since returned to compliance, per EPA records.
Muscoy Mwc No. 1
- Health-based Coliform (TCR): a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded once in November 2009. The EPA record for these does not include a measured level. All have since returned to compliance, per EPA records.
- Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 23 times between August 2020 and April 2024. EPA records do not show all of these as returned to compliance.
- Monitoring Coliform (TCR): a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times between May 2008 and January 2012. All have since returned to compliance, per EPA records.
Sbdno County Service Area 70j
- Monitoring Lead and Copper Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in October 2013. All have since returned to compliance, per EPA records.
Glen Helen Water System
As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.
Gilbert Street Complex
- Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in October 2025. EPA records do not show all of these as returned to compliance.
- Monitoring Lead and Copper Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times between October 2018 and October 2021. EPA records do not show all of these as returned to compliance.
Sbdno County Service Area 70 Cedar Glen
- Health-based Lead and Copper Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 4 times in October 2012. The EPA record for these does not include a measured level. All have since returned to compliance, per EPA records.
- Health-based Coliform (TCR): a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 12 times between June 1998 and January 2002. The EPA record for these does not include a measured level. All have since returned to compliance, per EPA records.
- Monitoring Total Haloacetic Acids (HAA5): a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in October 2023. All have since returned to compliance, per EPA records.
- Monitoring TTHM: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in October 2023. All have since returned to compliance, per EPA records.
- Monitoring Coliform (TCR): a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 8 times between May 2001 and January 2002. All have since returned to compliance, per EPA records.
- Monitoring Arsenic: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times in January 1994. All have since returned to compliance, per EPA records.
- Monitoring Tetrachloroethylene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times in January 1994. All have since returned to compliance, per EPA records.
- Monitoring Gross Alpha Particle Activity: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times in January 1994. All have since returned to compliance, per EPA records.
- Monitoring Nitrate: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times in January 1992. All have since returned to compliance, per EPA records.
Csa 70 W-3 Hacienda
- Health-based Combined Uranium: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 86 times between January 2016 and October 2025. The EPA record lists a level of 27 PCI/L; the limit (MCL) is 20 PCI/L. EPA records do not show all of these as returned to compliance.
- Health-based Gross Alpha Particle Activity: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 2 times in April 2016. The EPA record lists a level of 32 PCI/L; the limit (MCL) is 15 PCI/L. EPA records do not show all of these as returned to compliance.
- Monitoring Lead and Copper Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in July 1993. All have since returned to compliance, per EPA records.
Csa 42 Oro Grande
As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.
Csa 70 W-4 Pioneertown
- Health-based Fluoride: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 116 times between January 2012 and April 2019. The EPA record lists a level of 6.1 MG/L; the limit (MCL) is 2 MG/L. All have since returned to compliance, per EPA records.
- Health-based Arsenic: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 120 times between January 2012 and April 2019. The EPA record lists a level of 80 UG/L; the limit (MCL) is 10 UG/L. All have since returned to compliance, per EPA records.
- Health-based Combined Uranium: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 48 times between April 2012 and January 2018. The EPA record lists a level of 21 PCI/L; the limit (MCL) is 20 PCI/L. All have since returned to compliance, per EPA records.
- Monitoring TTHM: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 6 times in January 2022. EPA records do not show all of these as returned to compliance.
- Monitoring Total Haloacetic Acids (HAA5): a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 6 times in January 2022. EPA records do not show all of these as returned to compliance.
Csa 70-F Morongo
- Health-based Combined Uranium: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 87 times between January 2016 and October 2025. The EPA record lists a level of 36.5 PCI/L; the limit (MCL) is 20 PCI/L. EPA records do not show all of these as returned to compliance.
What this means
A health-based violation means a contaminant was recorded above the limit the EPA tracks for it. A monitoring or reporting violation means a required test or report was late or missed — not that a contaminant was measured above a limit. “Returned to compliance” means the EPA recorded the issue as resolved.
This page summarizes the EPA's own records and does not assess whether your water is safe to drink. For the most current details, you can verify every record directly with the EPA, and contact your water system with questions.
Source: U.S. EPA Envirofacts SDWIS, retrieved June 2026. Records cover the EPA's full reporting history for these systems. Verify at EPA ECHO.