Section 290.121 - Monitoring Plans(a) Applicability. All public water systems shall maintain an up-to-date chemical and microbiological monitoring plan. Monitoring plans are subject to the review and approval of the executive director. A copy of the monitoring plan must be maintained at each water treatment plant and at a central location.(b) Monitoring plan requirements. The monitoring plan shall identify all sampling locations, describe the sampling frequency, and specify the analytical procedures and laboratories that the public water system will use to comply with the monitoring requirements of this subchapter. (1) The monitoring plan shall include information on the location of all required sampling points in the system. Required sampling locations for regulated chemicals are provided in § 290.106 of this title (relating to Inorganic Contaminants), § 290.107 of this title (relating to Organic Contaminants), § 290.108 of this title (relating to Radionuclides Other than Radon), § 290.109 of this title (relating to Microbial Contaminants), § 290.110 of this title (relating to Disinfectant Residuals), § 290.111 of this title (relating to Surface Water Treatment), § 290.112 of this title (relating to Total Organic Carbon (TOC)), § 290.113 of this title (relating to Stage 1 Disinfection Byproducts (TTHM and HAA5)), § 290.114 of this title (relating to Other Disinfection Byproducts (Chlorite and Bromate)), § 290.115 of this title (relating to Stage 2 Disinfection Byproducts (TTHM and HAA5)), § 290.116 of this title (Relating to Groundwater Corrective Actions and Treatment Techniques), § 290.117 of this title (relating to Regulation of Lead and Copper), and § 290.118 of this title (relating to Secondary Constituent Levels). (A) The location of each sampling site at a treatment plant or pump station must be designated on a plant schematic. The plant schematic must show all water pumps, flow meters, unit processes, chemical feed points, and chemical monitoring points. The plant schematic must also show the origin of any flow stream that is recycled at the treatment plant, any pretreatment that occurs before the recycle stream is returned to the primary treatment process, and the location where the recycle stream is reintroduced to the primary treatment process.(B) Each entry point to the distribution system shall be identified in the monitoring plan as follows: (i) a written description of the physical location of each entry point to the distribution system shall be provided; or(ii) the location of each entry point shall be indicated clearly on a distribution system or treatment plant schematic.(C) The address of each sampling site in the distribution system shall be included in the monitoring plan or the location of each distribution system sampling site shall be designated on a distribution system schematic. The distribution system schematic shall clearly indicate the following: (i) the location of all pump stations in the distribution system;(ii) the location of all ground and elevated storage tanks in the distribution system; and(iii) the location of all chemical feed points in the distribution system.(D) The system must revise its monitoring plan if changes to a plant or distribution system require changes to the sampling locations.(2) The monitoring plan must include a written description of sampling frequency and schedule. (A) The monitoring plan must include a list of all routine samples required on a daily, weekly, monthly, quarterly, annual, or less frequent basis and identify the sampling location where the samples will be collected.(B) The system must maintain a current record of the sampling schedule.(3) The monitoring plan shall include the public water system's Sample Siting Plan as required by §290.109(d)(1) - (6) of this title. The public water system's Sample Siting Plans shall include a list of all microbial distribution compliance monitoring sites as required by § 290.109(d) of this title, including all routine and repeat microbial sample sites. As required by § 290.109(d)(2)(G) of this title, public water system that collects more than the minimum number of required routine microbial samples shall include the additional routine sample sites in the public water system's Sample Siting Plan. In addition, a public water system that is required to collect any associated raw groundwater source(s) compliance samples, as required by § 290.109(d)(4) of this title, shall include the microbial raw groundwater well compliance sites in the public water system's Sample Siting Plan. The repeat sample sites, as required by § 290.109(d)(3) of this title, shall be associated to their originating routine microbial sample sites. The Sample Siting Plan shall include all groundwater sources and any associated sampling points necessary to meet the requirements of § 290.109(d) of this title.(4) The monitoring plan must identify the analytical procedures that will be used to perform each of the required analyses.(5) The monitoring plan must identify all laboratory facilities that may be used to analyze samples required by this chapter.(6) The monitoring plan shall include a written description of the methods used to calculate compliance with all maximum contaminant levels, maximum residual disinfectant levels, and treatment techniques that apply to the system.(7) The monitoring plan shall include any groundwater source water monitoring plan developed under § 290.109(d)(4) of this title to specify well sampling for triggered coliform monitoring.(8) The monitoring plan shall include any initial distribution system evaluation compliance documentation required by § 290.115(c)(5) of this title. The monitoring plan must be revised to show Stage 2 sample sites by the date shown in Figure: 30 TAC § 290.115(a)(2) titled "Date to Start Stage 2 Compliance."(9) The monitoring plan shall include any raw surface water monitoring plan required under § 290.111 of this title.(c) Reporting requirements. All public water systems shall maintain a copy of the current monitoring plan at each treatment plant and at a central location. The water system must update the monitoring plan when the water system's sampling requirements or protocols change. (1) Public water systems that treat surface water or groundwater under the direct influence of surface water must submit a copy of the monitoring plan to the executive director upon development and revision.(2) Public water systems that treat groundwater that is not under the direct influence of surface water or purchase treated water from a wholesaler must develop a monitoring plan and submit a copy of the monitoring plan to the executive director upon request.(3) All water systems must provide the executive director with any revisions to the plan upon request.(d) Compliance determination. Compliance with the requirements of this section shall be determined using the following criteria. (1) A public water system that fails to submit an administratively complete monitoring plan by the required date documented in a request from the executive director or fails to submit updates to a plan when changes are made to a system's surface water treatment commits a reporting violation.(2) A public water system that fails to maintain an up-to-date monitoring plan commits a monitoring violation.(e) Public notification. A community system that commits a violation described in subsection (d) of this section shall notify its customers of the violation in the next Consumer Confidence Report that is issued by the system.30 Tex. Admin. Code § 290.121
The provisions of this §290.121 adopted to be effective September 13, 2000, 25 TexReg 8880; amended to be effective May 16, 2002, 27 TexReg 4127; amended to be effective February 19, 2004, 29 TexReg 1373; amended to be effective December 23, 2004, 29 TexReg 11729; amended to be effective January 9, 2008, 33 TexReg 198; amended to be effective May 15, 2011, 36 TexReg 2860; Amended by Texas Register, Volume 42, Number 12, March 24, 2017, TexReg 1519, eff. 3/30/2017