Water Quality Reports

2015 Water Quality Report - Cameron County Service Area ID # 1080067    2015 Water Quality Report - Hidalgo County Service Area ID # 1080234    2015 Water Quality Report - Weslaco Service Area ID # 1080235   2015 Water Quality Report - Del Mar Heights Service Area ID # 0310147    2014 April & May Turbidity Violation Notice   May 8, 2015 - MCL TTHM Violation Notice   May 28, 2015 - MCL, AVERAGE / ARSENIC - 1080067   July 8, 2015 - City of Weslaco - Public Notice of Boil Water   July 9, 2015 - City of Weslaco - Boil Water Rescind Notice   July 28, 2015 - Rangerville & FM800 Customers - Public Notice of Boil Water   July 30, 2015 - Rangerville & FM800 Customers - Boil Water Rescind Notice   August 14, 2015 - MCL Avergage/Arsenic - 1080067   November 13, 2015 - MCL, Average/Arsenic - 1080067   January 20, 2016 - Lead and Copper Rule Monitoring and Reporting Violation - 1080234   August 2, 2016 - MCL, Average/Arsenic - 1080067   October 12, 2016 - MCL, LRAA TTHM - 1080067   October 12, 2016 - MCL, Average Arsenic - 1080067   December 29, 2016 - MCL, Average Arsenic - 1080067   March 9, 2017 - Bluetown, Los Indios and South Rangerville - Public Notice to Boil Water   March 13, 2017 - MCL, LRAA TTHM (fourth quarter of 2016) - 1080067   March 13, 2017 - MCL, Average Arsenic (fourth quarter of 2016) - 1080067   March 14, 2017 - Bluetown, Los Indios and South Rangerville - Boil Water Rescind Notice - 1080067   June 23, 2017 - MCL, Average Arsenic (quarter one 2017) - 1080067   June 23, 2017 - MCL, LRAA TTHM - Trihalomethane (quarter one 2017) - 1080067   2016 Annual Drinking Water Quality Report - Consumer Confidence Report - Las Rusias WTP - 1080067   2016 Annual Drinking Water Quality Report - Consumer Confidence Report - Del Mar Heights - 0310147   2016 Annual Drinking Water Quality Report - Consumer Confidence Report - South Weslaco - 1080235   2016 Annual Drinking Water Quality Report - Consumer Confidence Report - Progreso - 1080234   August 25, 2017 - MCL, LRAA TTHM - Trihalomethane (quarter two 2017) - 1080067   September 12, 2017 - ERHWSC - changing the primary disinfectant from Chloramine to Free Chlorine on October 2, 2017 through October 31, 2017 (only to the Del Mar Height-0310147 customer)   December 13, 2017 - MCL, LRAA TTHM - Trihalomethane (quarter three 2017) - 1080067   January 19, 2018 - MCL, LRAA TTHM - Trihalomethane (quarter four 2017) - 1080067   2017 Annual Drinking Water Quality Report - Consumer Confidence Report - Las Rusias WTP - 1080067   2017 Annual Drinking Water Quality Report - Consumer Confidence Report - Progreso - 1080234   2017 Annual Drinking Water Quality Report - Consumer Confidence Report - Weslaco - 1080235   2017 Annual Drinking Water Quality Report - Consumer Confidence Report - Del Mar Heights - 0310147   07-20-2018 - East Rio Hondo Water Supply Corporation - WHOLESALE CUST. FCL2 NOTICE   08-06-2018 - Total Haloacetic Acids (HAA5) - 1080067 - (quarter two 2018)   08-06-2018 - TTHM - Trihalomethane - 1080067 - (quarter two 2018)   02-20-2019 - Total Haloacetic Acids (HAA5) - 1080067 - (quarter three 2018)   02-20-2019 - Total Haloacetic Acids (HAA5) - 1080067 - (quarter four 2018)   05-09-2019 - Boil Water Notice - south Alamo & south San Juan   05-11-2019 - MHWSC - Boil Water Rescind Notice (south Alamo & south San Juan)   05-31-2019 - TTHM - Trihalomethane - 1080067 - quarter four 2018   05-31-2019 - TTHM - Trihalomethane - 1080067 - quarter one 2019   05-31-2019 - Total Haloacetic Acids (HAA5) - 1080067 - quarter one 2019   2018 Annual Drinking Water Quality Report - Consumer Confidence Report - Las Rusias WTP 1080067   2018 Annual Drinking Water Quality Report - Consumer Confidence Report - Progreso 10800234   2018 Annual Drinking Water Quality Report - Consumer Confidence Report - Weslaco 1080235   2018 Annual Drinking Water Quality Report - Consumer Confidence Report - Del Mar Heights 0310147   09-23-2019 - TTHM - Trihalomethane - 1080067 - quarter two 2019 (public notice)   2019 Annual Drinking Water Quality Report - Consumer Confidence Report - Las Rusias WTP 1080067   2019 Annual Drinking Water Quality Report - Consumer Confidence Report - Progreso 10800234   2019 Annual Drinking Water Quality Report - Consumer Confidence Report - Weslaco 1080235   2019 Annual Drinking Water Quality Report - Consumer Confidence Report - Del Mar Heights 0310147   ERHWSC 07-08-2020 WHOLESALE CUST. FCL2 NOTICE   Lead & Copper Rul Monitoring and Reporting Violation Mandatory Language - Tier III - 1080067 (public notice)   06-21-2021 - Harlingen Waterworks System - Planned Temporary Change in Treatment Method   06-21-2021 - East Rio Hondo Water Supply Corporation - WHOLESALE CUST. FCL2 NOTICE   2020 Annual Drinking Water Quality Report - Consumer Confidence Report - Las Rusias WTP 1080067   2020 Annual Drinking Water Quality Report - Consumer Confidence Report - Progreso 10800234   2020 Annual Drinking Water Quality Report - Consumer Confidence Report - Weslaco 1080235   2020 Annual Drinking Water Quality Report - Consumer Confidence Report - Del Mar Heights 0310147   07-03-2021 - Boil Water Notice for Customers in Cameron County (1080067)   07-05-2021 - Boil Water Notice Rescinded for Customers in Cameron County (1080067)   02-15-2021 - MHWSC - Boil Water Notice (Del Mar Heights area) - 0310147   02-15-2021 - MHWSC - Boil Water Notice (El Ranchito, La Paloma and Los Indios) - 1080067   02-15-2021 - MHWSC - Boil Water Notice (South Alamo, Runn, Progreso and Progreso Lakes) - 1080234   02-16-2021 - MHWSC - Update - Boil Water Notice (El Ranchito, La Paloma, Los Indios, Santa Maria and Bluetown) - 1080067   02-23-2021 - MHWSC - Boil Water Notice Rescinded (Del Mar Heights area) - 0310147   02-23-2021 - MHWSC - Boil Water Notice Rescinded (South Alamo, Runn, Progreso and Progreso Lakes) - 1080234   02-24-2021 - MHWSC - Boil Water Notice Rescinded (El Ranchito, La Paloma and Los Indios) - 1080067   10-15-2021 - MCL, Average Arsenic (third quarter 2021) - 1080067.pdf   01-14-2022 - MCL, Average Arsenic (fourth quarter 2021) - 1080067   06-03-2022 - MHWSC Boil Water Notice - 1080234 ( northeast and southeast of the intersection of FM 1015 and Malone St)   06-07-2022 - MHWSC Boil Water Notice Rescinded - 1080234 ( northeast and southeast of the intersection of FM 1015 and Malone St)   2021 Annual Drinking Water Quality Report (CCR's) - Weslaco 1080235   2021 Annual Drinking Water Quality Report (CCR's) - Progreso 1080234   2021 Annual Drinking Water Quality Report (CCR's) - Las Rusias 1080067   2021 Annual Drinking Water Quality Report (CCR's) - Del Mar Heights 0310147   06-30-2022 - MCL, AVERAGE - ARSENIC (quarter one 2022) - 1080067   08-31-2022 - MCL, AVERAGE - ARSENIC (quarter two 2022) - 1080067   *04-29-2023 - MHWSC Boil Water Notice (TX1080234)   05-02-2023 - Boil Water Notice Rescinded (TX1080234)

All Public Water Systems, like MHWSC, are required by the Safe Drinking Water Act to provide a Water Quality Report to its consumers on an annual basis to report the type and quantity of substances that are found in our water.  Each Service Area has its own report since the source of water is different for each system. The report is designed to inform you about the quality of the water we deliver to you 24 hours a day, 365 days a year. The report details where your water comes from, what it contains, and how that compares with regulatory standards. Our constant goal is to provide you with a safe and dependable supply of drinking water.  We are committed to ensuring the quality of your drinking water.  We want you  to have the information in the report so you will be able to understand and support the efforts needed to maintain the high standards required of our drinking water. The sources of drinking water (both tap and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally occurring minerals, and in some cases, can pick up substances resulting from the presence of animals or from human activity. Our water sources include ground water from multiple wells that pump from the Rio Grande Alluvial Aquifer and surface water from the Rio Grande River. The presence of contaminants in drinking water, including bottled water, does not necessarily indicates that it poses a health risk.  

In order to assure tap water is safe to drink, the Environmental Protection Agency (EPA) prescribes regulations which limit the amounts of certain contaminants in water provided by public water systems. The Food and Drug Administration (FDA) prescribes regulations which establish limits for contaminants in bottled water which must provide the same protection for public health. The data in this report was prepared from the most recent required tests set by the EPA. The Texas Commission on Environmental Quality conducts most of the water quality tests and provides the results for this report.

Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk from infections. These persons should seek advise about drinking water from their health care providers. If you have any questions about these reports, contact the main office.

Este reporte incluye informaciÓn importante sobre su agua de beber. Para obtener una copia de Éste reporte en Espanol, llÁme a la oficina central al telÉfono (956) 565-2491.