CA / North Fork
CA · Tap water records
North Fork tap water, in plain English
Here is what the EPA's own data shows about tap water in North Fork. According to EPA SDWIS data retrieved June 2026, North Fork is served by 3 active community water systems, together reported to serve about 382 people.
As of June 2026, EPA records show 143 violations across the community water system(s) serving North Fork, going back to the earliest EPA record. 127 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
Sierra Linda Mutual Water Co
200 served · groundwater · PWSID CA2000506 - Health-based Combined Uranium: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 27 times between January 2016 and October 2025. The EPA record lists a level of 120 PCI/L; the limit (MCL) is 20 PCI/L. EPA records do not show all of these as returned to compliance.
- Health-based Arsenic: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 42 times between January 2016 and October 2025. The EPA record lists a level of 0.029 MG/L; the limit (MCL) is 0.01 MG/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 25 times between January 2016 and October 2025. The EPA record lists a level of 148 PCI/L; the limit (MCL) is 15 PCI/L. EPA records do not show all of these as returned to compliance.
- Health-based Iron: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 6 times between January 2023 and April 2025. The EPA record lists a level of 0.475 MG/L; the limit (MCL) is 0.3 MG/L. EPA records do not show all of these as returned to compliance.
- Health-based Manganese: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 5 times between January 2023 and April 2025. The EPA record lists a level of 0.0825 MG/L; the limit (MCL) is 0.05 MG/L. EPA records do not show all of these as returned to compliance.
- 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.
Cascadel Mutual Water System
137 served · groundwater · PWSID CA2000509 - Monitoring 1,2,3-Trichloropropane: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 9 times in January 2022. EPA records do not show all of these as returned to compliance.
- Monitoring TTHM: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in January 2022. All have since returned to compliance, per EPA records.
- Monitoring Asbestos: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in January 2011. All have since returned to compliance, per EPA records.
Leisure Acres Mutual Water Company
45 served · groundwater · PWSID CA2000534 - Health-based Arsenic: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 21 times between January 2009 and April 2023. The EPA record lists a level of 0.013 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 between January 2014 and April 2020. 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 2019. 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.
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.