Here is what the EPA's own data shows about tap water in Rock. According to EPA SDWIS data retrieved October 2026, Rock is served by 1 active community water system, together reported to serve about 85 people.
As of October 2026, EPA records show 2,353 violations across the community water system(s) serving Rock, going back to the earliest EPA record. 25 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.
Health-based Revised Total Coliform Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 5 times between July 2023 and March 2026. The EPA record for these does not include a measured level. EPA records do not show all of these as returned to compliance.
Health-based Stage 1 Disinfectants and Disinfection Byproducts Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 2 times between February 2012 and February 2024. The EPA record for these does not include a measured level. EPA records do not show all of these as returned to compliance.
Health-based Surface Water Treatment Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 10 times between July 2016 and February 2023. The EPA record for these does not include a measured level. EPA records do not show all of these as returned to compliance.
Health-based Groundwater Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 8 times between July 2021 and July 2021. The EPA record for these does not include a measured level. EPA records do not show all of these as returned to compliance.
Monitoring Public Notice: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 345 times between January 2005 and March 2026. 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 26 times between January 1994 and October 2025. 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 24 times between October 1999 and October 2025. EPA records do not show all of these as returned to compliance.
Monitoring Chlorine: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 35 times between October 2013 and July 2025. EPA records do not show all of these as returned to compliance.
Monitoring 1,2,4-Trichlorobenzene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring cis-1,2-Dichloroethylene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring Xylenes, Total: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring DICHLOROMETHANE: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring o-Dichlorobenzene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring p-Dichlorobenzene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring Vinyl chloride: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring 1,1-Dichloroethylene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring trans-1,2-Dichloroethylene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring 1,2-Dichloroethane: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring 1,1,1-Trichloroethane: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring Carbon tetrachloride: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring 1,2-Dichloropropane: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring Trichloroethylene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring 1,1,2-Trichloroethane: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring Tetrachloroethylene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring CHLOROBENZENE: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring Benzene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring Toluene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring Ethylbenzene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring Styrene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 40 times between October 2012 and January 2025. EPA records do not show all of these as returned to compliance.
Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 55 times between April 2016 and January 2025. 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 31 times between April 2013 and July 2024. 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 30 times between April 2013 and July 2024. EPA records do not show all of these as returned to compliance.
Monitoring Sodium: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 5 times between January 2011 and January 2023. 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 5 times between January 2011 and January 2023. EPA records do not show all of these as returned to compliance.
Monitoring Groundwater Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 87 times between April 2013 and October 2022. EPA records do not show all of these as returned to compliance.
Monitoring BHC-GAMMA: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring Methoxychlor: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring Di(2-ethylhexyl) adipate: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring Simazine: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring Di(2-ethylhexyl) phthalate: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring Picloram: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring Hexachlorocyclopentadiene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring Atrazine: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring LASSO: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring Heptachlor: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring Heptachlor epoxide: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring 2,4-D: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring Benzo(a)pyrene: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring Total Polychlorinated Biphenyls (PCB): a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring Chlordane: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 39 times between January 2012 and July 2022. EPA records do not show all of these as returned to compliance.
Monitoring OXAMYL: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 38 times between January 2012 and April 2022. EPA records do not show all of these as returned to compliance.
Monitoring Carbofuran: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 38 times between January 2012 and April 2022. EPA records do not show all of these as returned to compliance.
Monitoring Gross Alpha, Excl. Radon and U: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 37 times between October 2012 and April 2022. All have since returned to compliance, per EPA records.
Monitoring Radium-228: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 37 times between October 2012 and April 2022. 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 9 times between January 2012 and January 2022. All have since returned to compliance, per EPA records.
Monitoring CYANIDE: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 5 times between January 2011 and January 2020. All have since returned to compliance, per EPA records.
Monitoring Fluoride: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 5 times between January 2011 and January 2020. All have since returned to compliance, per EPA records.
Monitoring Nitrite: 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 January 2020. All have since returned to compliance, per EPA records.
Monitoring Barium: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between January 2011 and January 2017. All have since returned to compliance, per EPA records.
Monitoring Cadmium: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between January 2011 and January 2017. All have since returned to compliance, per EPA records.
Monitoring Chromium: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between January 2011 and January 2017. All have since returned to compliance, per EPA records.
Monitoring Mercury: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between January 2011 and January 2017. All have since returned to compliance, per EPA records.
Monitoring Nickel: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between January 2011 and January 2017. All have since returned to compliance, per EPA records.
Monitoring Antimony, Total: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between January 2011 and January 2017. All have since returned to compliance, per EPA records.
Monitoring Beryllium, Total: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between January 2011 and January 2017. All have since returned to compliance, per EPA records.
Monitoring Thallium, Total: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between January 2011 and January 2017. All have since returned to compliance, per EPA records.
Monitoring Selenium: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between January 2011 and January 2017. 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 53 times between October 2011 and February 2016. 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 October 2026. Records cover the EPA's full reporting history for these systems. Verify at EPA ECHO.