{"data":{"id":"us-va/12vac5-590-570","jurisdiction":"us-va","citation":"12VAC5-590-570","heading":"Operational reporting requirements","body":"A. Monthly operational reports.\n\n1. A classified waterworks is required to report monthly information to the department no later than the 10th of the month following the month during which the monitoring period occurred.\n\n2. A classified waterworks using conventional filtration shall report using the monthly operating report (MOR) form approved by the department. All other classified waterworks shall report the required information specified in Tables 570.1 through 570.14, based on the treatment processes employed. Monitoring data shall be collected for each day the operating staff attend to the operation of the facilities.\n\n3. To determine if a waterworks using UV reactor systems is operating within validated conditions designed in accordance with 12VAC5-590-1005, the following parameters shall be monitored and reported: (i) on/off status for each reactor; (ii) flow rate through reactor train; (iii) UV intensity as measured by a UV sensor; (iv) lamp status; (v) lamp age; and (vi) UV transmittance. The operational set points shall be reported if set point control is used. The calculated UV dose shall be reported if other than a set point control is used.\n\n4. An unclassified waterworks is required to report quarterly the following information specified in Table 570.1, where applicable, to the department no later than the 10th of the month following the calendar quarter during which the monitoring period occurred.\n\n5. An unclassified waterworks that is using any of the treatment processes described in Tables 570.2 through 570.14 is required to report no later than the 10th of the month following the calendar month during which the monitoring occurred. The report shall contain the required information specified in Tables 570.1 through 570.14 based on the treatment processes employed. The monitoring data shall be collected at a minimum frequency as established by the department.\n\n6. An owner of a waterworks that is required to submit an MOR to the office shall include any noncritical equipment failure or malfunction that could adversely affect water quality, public health, or service continuity that occurred during the applicable reporting month and was not resolved by the reporting deadline. For the purposes of this subsection, any noncritical equipment failure or malfunction that is effectively addressed by equipment repair or replacement, alternative equipment use, alternative system operation, or such other response shall be considered resolved.\n\n7. The department may vary the reporting requirements on a case-by-case basis.\n\nTable 570.1\n\nBaseline Data -- All Waterworks\n\nPublic water system ID no.\n\nSystem name\n\nReporting month and year (reporting quarter and yeara)\n\nLocation (county)\n\nNumber of connections, monthly average (maximum for reporting perioda)\n\nPopulation served, monthly average (quarterly average and maximum daya)\n\nTotal source water withdrawn, gpd\n\nTotal source water treated, gpd\n\nTotal finished water produced, gal/month (for each entry point) or\n\nTotal water purchased, gal/month (at each consecutive connection)\n\nOperator name (printed and signature)\n\nOperator classification (Class 1 to Class 6)\n\nOperator DPOR certification no.\n\nName and contact information of the emergency contact person (text, voice phone number)\n\nRequired for an unclassified waterworksa\n\nTable 570.2\n\nChlorine Disinfection\n\nChlorine compound used (chlorine gas, calcium hypochlorite or sodium hypochlorite)\n\nAmount of chlorine compound used at each application point, lb/day\n\nResidual disinfectant concentration (measured as total chlorine, free chlorine, combined chlorine, or chlorine dioxide) at entry point, mg/L\n\nChlorite concentration (if chlorine dioxide is used), daily measurement at entry point, mg/L\n\nTable 570.3\n\nChlorine Residual in the Distribution System\n\nChlorine compound used (chlorine gas, calcium hypochlorite or sodium hypochlorite)\n\nResidual disinfectant concentration, measured as total chlorine, free chlorine, combined chlorine, or chlorine dioxide, mg/L (collected with each total coliform bacteria sample, in accordance with approved sampling plan)\n\nTable 570.4\n\nRechlorination in the Distribution System\n\nChlorine compound used (chlorine gas, calcium hypochlorite or sodium hypochlorite)\n\nAmount of chlorine compound used at each application point, lb/day\n\nFree chlorine residual concentration before rechlorination, mg/L\n\nFree chlorine residual concentration after rechlorination, mg/L\n\nFree chlorine residual, mg/L (measured and reported with each total coliform bacteria sample, in accordance with approved sampling plan)\n\nTable 570.5\n\nIron and Manganese Treatment by Oxidation, Detention and Filtration\n\nSource water iron and manganese concentrations, mg/L (each source)\n\nOxidant amount used, lb/day\n\nFinished water iron and manganese concentrations, mg/L (each filter)\n\nFinished water pH (each filter)\n\nFilter hours between backwash (each filter)\n\nTable 570.6\n\nIron and Manganese Treatment by Ion Exchange\n\nIon exchange material (type, manufacturer, and product name)\n\nSource water iron and manganese concentrations, mg/L (each source)\n\nFinished water iron and manganese concentrations, mg/L (each unit softener)\n\nFinished water pH (each unit softener)\n\nHead loss, psi (each unit softener)\n\nRegeneration date and method (each unit softener)\n\nBackwash date and duration of washing (each unit softener)\n\nBackwash rate, gpm (each unit softener)\n\nTable 570.7\n\nSequestration of Iron and Manganese\n\nChemical used (manufacturer and product name)\n\nQuantity used, lb/day (average)\n\nSource water iron and manganese concentrations, mg/L (each source)\n\nFinished water (entry point) iron and manganese concentrations, mg/L\n\nFinished water (entry point) treatment chemical concentration, mg/L\n\nTreatment chemical residual concentration, mg/L (value at distal end of distribution system, report at same frequency as free chlorine residual testing)\n\nTable 570.8\n\npH Adjustment or Corrosion Control by Chemical Addition\n\nChemical used (manufacturer and product name)\n\nQuantity used, lb/day (average)\n\nSource water pH\n\nFinished water (entry point) pH\n\nFinished water (entry point) treatment chemical concentration, mg/L (if required water quality parameter for compliance with lead and copper)\n\nTable 570.9\n\nCation Exchange Softening\n\nCation exchange material (type, manufacturer, and product name)\n\nRegeneration date and method (each unit)\n\nBackwashing date and duration of washing (each unit)\n\nSoftener influent hardness, mg/L as CaCO3 (each source)\n\nSoftener effluent hardness, mg/L as CaCO3 (each unit)\n\nStabilization chemical type, weight, daily dosage\n\nFinished water (entry point) pH\n\nFinished water (entry point) alkalinity, mg/L\n\nFinished water (entry point) hardness, as CaCO3\n\nTable 570.10\n\nFluoridation\n\nChemical used (manufacturer and product name)\n\nFluoride used, lb/day\n\nFluoride dosage, mg/L (daily)\n\nWater treated, MGD\n\nFinished water (entry point) fluoride concentration, mg/L (maximum, minimum, and average)\n\nTable 570.11\n\nMicrofiltration or Ultrafiltration\n\nHours unit in operation\n\nSource water flow, gpd\n\nFiltrate volume, gpd\n\nRecirculated during suspension mode (volume or percent of feed flow, per day)\n\nWaste volume, gpd\n\nMaximum stabilized flux, gpd/ft2\n\nSource water turbidity, NTU bench test (daily)\n\nSource water turbidity, NTU in line (collected at same time as bench test)\n\nSource water turbidity, NTU in-line (maximum daily)\n\nSource water alkalinity, mg/L as CaCO3 (daily)\n\nSource water hardness, mg/L as CaCO3 (daily)\n\nSource water temperature, oC (daily)\n\nSource water pH (daily)\n\nFiltered water turbidity, NTU bench test (daily)\n\nFiltered water turbidity, NTU in line (collected at same time as bench test)\n\nFiltered water turbidity, NTU in line (maximum daily)\n\nPressure loss across pre-filter, psi (daily) (if pre-filters are automatically cleaned, reporting is not required)\n\nNumber of membrane modules in use (daily)\n\nDirect integrity test start time (daily)\n\nDirect integrity test starting pressure, psi (each membrane unit, daily)\n\nDirect integrity test final pressure, psi (daily)\n\nDirect integrity test duration, minutes (daily)\n\nDirect integrity test pressure decay rate, psi/minute (daily)\n\nDirect integrity test Log Removal Value (daily)\n\nTrans-membrane pressure, psi (daily)\n\nTrans-membrane pressure before clean-in-place, psi\n\nTrans-membrane pressure after clean-in-place, psi\n\nCleaning solution used (manufacturer and product name)\n\npH of rinse water after clean-in-place\n\nCalibrations completed (itemized instruments with dates completed)\n\nModule repairs or replacements (itemized with dates repairs or replacements)\n\nEntry point log inactivation of Giardia by disinfection (daily)\n\nTable 570.12\n\nReverse Osmosis\n\nHours unit in operation\n\nPre-filter inlet pressure, psi (daily)\n\nPre-filter outlet pressure, psi (daily)\n\nRO Inlet pressure, psi (daily)\n\nRO outlet pressure, psi (daily)\n\nTotal permeate flow, gpd\n\nConcentrate flow (bypass), gpd\n\nFinished water flow, gpd\n\nTotal finished water (entry point) flow, gpd\n\nPre RO TDS, mg/L (daily)\n\nPost RO TDS, mg/L (daily)\n\nPre RO turbidity, NTU (daily)\n\nPost RO turbidity, NTU\n\nPre RO conductivity, uS/cm (daily)\n\nPost RO conductivity, uS/cm (daily)\n\nFinished water conductivity, uS/cm (daily)\n\nSource water pH (daily)\n\nPermeate pH (daily)\n\nFinished water (entry point) pH (daily)\n\nModule repairs or replacements (itemized with dates of repairs or replacements)\n\nTable 570.13\n\nUV Disinfection\n\nAll waterworks using ultraviolet (UV) disinfection must report the following:\n\nTotal run time, hours (per unit)\n\nLamp status for each reactor train\n\nLamp age for each reactor train\n\nTotal production, MGD or gpd\n\nFlow Rates, minimum, maximum and average, MGD or gpd for each reactor train\n\nTo receive disinfection credit, the following shall also be reported:\n\nNumber of off-specification events\n\nTotal off-specification volume, gal\n\nPercent off-specification volume\n\nUV Intensity setpoint, W/m2 (if using intensity setpoint approach, daily)\n\nUV Intensity for each reactor, minimum, W/m2 (if using intensity setpoint approach, daily)\n\nUV Intensity sensor calibration date for each reactor\n\nRequired dose, mJ/cm2 (if using calculated dose approach)\n\nUV Transmittance (UVT) for each reactor, daily percentage (if using calculated dose approach)\n\nCalculated dose for each reactor, daily minimum, mJ/cm2 (if using calculated dose approach)\n\nValidated dose for each reactor, daily minimum, mJ/cm2 (if using calculated dose approach)\n\nUVT analyzer calibration date (if using calculated dose approach)\n\nUV intensity sensor correction factor\n\nTable 570.14\n\nOzone Disinfection\n\nAll waterworks using ozone disinfection must report the following:\n\nOzone applied, lb/day and mg/L.\n\nBromate concentration (mg/L), at the entry point to the distribution system, monthly.\n\nTo receive disinfection credit, the waterworks shall also report:\n\nMinimum ozone concentration Cinitial from first sample point (Effluent Method) or Cgeo (Log Integration Method) in all contactors during peak flow, daily.\n\nMinimum and average ozone concentration Cfinal (mg/L) for each contactor in service, daily.\n\nLog Inactivation by ozonation, for Giardia, virus and, if applicable, Cryptosporidium, daily at peak flow and the minimum CT, daily.\n\nB. The owner shall report the following incidents:\n\n1. Any critical equipment failure or malfunction or contaminant release shall be reported to the office as soon as practicable but no more than two hours after discovery.\n\n2. Water pressure below the 20 psi minimum required in the distribution system, including zero or negative pressure, that is not caused by a critical equipment failure or malfunction shall be reported to the department within 24 hours.\n\n3. Any other situation that occurs with the waterworks that presents or may present an imminent and substantial threat to public health shall be reported to the department within 24 hours.","path":["Title 12. Health","Agency 5. Department of Health","Chapter 590. Waterworks Regulations","Part II. Operation Regulations for Waterworks","Article 3. Operation of Waterworks [Repealed]"],"source_url":"https://law.lis.virginia.gov/admincode/title12/agency5/chapter590/section570/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:50:42Z","sha256":"be182381707a883e5cdda357aff7809e904683aad9f93a5a015bb4bcd8e5cd13","source_id":"us-va-vac","stale":false,"prev":"us-va/12vac5-590-565","next":"us-va/12vac5-590-580"},"notice":"GroundRules: Original legal text. Not legal advice."}