CA / Los Angeles
CA · Tap water records
Los Angeles tap water, in plain English
Here is what the EPA's own data shows about tap water in Los Angeles. According to EPA SDWIS data retrieved June 2026, Los Angeles is served by 21 active community water systems, together reported to serve about 7,846,769 people.
As of June 2026, EPA records show 134 violations across the community water system(s) serving Los Angeles, going back to the earliest EPA record. 91 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
Los Angeles-City, Dept. Of Water & Power
7,751,132 served · surface water · PWSID CA1910067 - Health-based Long Term 2 Enhanced Surface Water Treatment Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 5 times in January 2018. The EPA record for these does not include a measured level. All have since returned to compliance, per EPA records.
- Health-based Groundwater Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 5 times in January 2016. The EPA record for these does not include a measured level. All have since returned to compliance, per EPA records.
- Monitoring Interim Enhanced Surface Water Treatment Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 5 times in March 2016. All have since returned to compliance, per EPA records.
- Monitoring Groundwater Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 5 times in January 2016. All have since returned to compliance, per EPA records.
Santa Monica-City, Water Division
89,947 served · surface water · PWSID CA1910146 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.
Lake Park Village Condominiums
900 served · groundwater · PWSID MI0002277 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.
Quail Hill Mobile Home Park
878 served · surface water · PWSID CO0121633 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.
Woodshire East Mobile Home Park Ltd
751 served · surface water · PWSID CO0103853 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.
Vista Village Mhp
750 served · surface water · PWSID CO0107810 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.
Glenwood Mobile Estates
468 served · groundwater · PWSID CA1400030 - Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times in June 2017. 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 July 1993. All have since returned to compliance, per EPA records.
Mountain View Trailer Court
320 served · groundwater · PWSID CA1400099 - Monitoring Coliform (TCR): a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 6 times between April 2015 and August 2015. 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 July 1993. All have since returned to compliance, per EPA records.
Brookview Mhp
300 served · groundwater · PWSID WI6320316 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.
Muscatine Mhp Llc
245 served · groundwater · PWSID IA7000601 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.
Stonegate Mobile Home Park
196 served · groundwater · PWSID CA4900795 - 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 September 2011. All have since returned to compliance, per EPA records.
Grove Estates Mhp
162 served · groundwater · PWSID GA2250003 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.
Suburban Estates Mhp
150 served · groundwater · PWSID MI0040177 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.
Fire Suppression Camp #19
125 served · surface water · PWSID CA1900901 - 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 in July 2018. All have since returned to compliance, per EPA records.
California Conservation Camp #14
107 served · surface water · PWSID CA1900007 - 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 July 2018 and January 2022. All have since returned to compliance, per EPA records.
Country View Mobile Home Community Llc
80 served · groundwater · PWSID WI1130248 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.
Golden Valley Mobile Home Park
80 served · groundwater · PWSID WI6320484 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.
Kern Mobile Estates Llc
73 served · groundwater · PWSID CA1500571 - Health-based Arsenic: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 79 times between January 2008 and October 2025. The EPA record lists a level of 0.0167 MG/L; the limit (MCL) is 0.01 MG/L. EPA records do not show all of these as returned to compliance.
- Monitoring Consumer Confidence Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 6 times between July 2007 and July 2015. 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 once in January 2013. 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 2 times between January 1996 and October 2011. 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 5 times between October 2007 and July 2011. All have since returned to compliance, per EPA records.
Los Angeles, City Of - Power Plant #2
44 served · surface water · PWSID CA1900542 - Health-based Surface Water Treatment Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded once in January 1992. The EPA record lists a level of 0 ; the limit (MCL) is 0 . All have since returned to compliance, per EPA records.
Control Gorge Power Plant Ladwp
32 served · surface water · PWSID CA1400155 - 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 2020. 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 once in January 2020. 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 once in January 2020. All have since returned to compliance, per EPA records.
Los Angeles, City Of - Power Plant #1
29 served · surface water · PWSID CA1900555 - Health-based Surface Water Treatment Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded once in January 1992. The EPA record lists a level of 0 ; the limit (MCL) is 0 . All have since returned to compliance, per EPA records.
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.