CA / Brentwood
CA · Tap water records
Brentwood tap water, in plain English
Here is what the EPA's own data shows about tap water in Brentwood. According to EPA SDWIS data retrieved June 2026, Brentwood is served by 5 active community water systems, together reported to serve about 65,022 people.
As of June 2026, EPA records show 79 violations across the community water system(s) serving Brentwood, going back to the earliest EPA record. 54 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.
What the EPA has on record, by system
Brentwood
64,513 served · surface water · PWSID CA0710004 - Health-based Nitrate: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 2 times in January 1991. The EPA record lists a level of 95 MG/L; the limit (MCL) is 45 MG/L. 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 2 times in January 2000. All have since returned to compliance, per EPA records.
- Monitoring Bromodichloromethane: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in July 1998. All have since returned to compliance, per EPA records.
- Monitoring Bromoform: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in July 1998. All have since returned to compliance, per EPA records.
- Monitoring Chloroform: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in July 1998. All have since returned to compliance, per EPA records.
- Monitoring Dibromochloromethane: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in July 1998. All have since returned to compliance, per EPA records.
Orwood Resort
350 served · groundwater · PWSID CA0707545 - Health-based LEAD AND COPPER RULE REVISIONS: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded once in October 2024. The EPA record for these does not include a measured level. EPA records do not show all of these as returned to compliance.
- Monitoring LEAD AND COPPER RULE REVISIONS: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in October 2024. 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 October 2023. EPA records do not show all of these as returned to compliance.
Sandy Point Mobile Home Park
67 served · groundwater · PWSID CA0707597 - Health-based LEAD AND COPPER RULE REVISIONS: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded once in October 2024. The EPA record for these does not include a measured level. EPA records do not show all of these as returned to compliance.
- Monitoring LEAD AND COPPER RULE REVISIONS: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in October 2024. 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 3 times between October 2017 and October 2021. EPA records do not show all of these as returned to compliance.
Country Villa Apts
60 served · groundwater · PWSID CA5000218 - Health-based Arsenic: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 49 times between January 2016 and October 2025. The EPA record lists a level of 0.022 MG/L; the limit (MCL) is 0.01 MG/L. EPA records do not show all of these as returned to compliance.
- Monitoring Arsenic: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in July 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 December 2001 and October 2002. All have since returned to compliance, per EPA records.
Colonia Santa Maria
32 served · groundwater · PWSID CA0707517 - Health-based LEAD AND COPPER RULE REVISIONS: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded once in October 2024. The EPA record for these does not include a measured level. EPA records do not show all of these as returned to compliance.
- Monitoring LEAD AND COPPER RULE REVISIONS: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in October 2024. 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 4 times between July 1993 and October 2023. 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.