Public water systems face a unique compliance challenge: overlapping federal and state monitoring requirements under the Safe Drinking Water Act (SDWA) with different parameters, sampling frequencies, calculation methods, and reporting cycles all running simultaneously. From monthly coliform testing to triennial inorganic scans to the new PFAS MCLs, water quality software provides the centralized platform needed to manage it all without gaps.
Drinking Water Compliance Challenges
Key Regulatory Programs Supported
National Primary Drinking Water Regulations (MCLs)
Track compliance against Maximum Contaminant Levels for over 90 regulated contaminants organized by category: microorganisms, disinfectants, disinfection byproducts, inorganic chemicals, organic chemicals, and radionuclides. Software stores each MCL, compares every result on import, and tracks compliance status across monitoring periods.
Lead and Copper Rule (LCR & LCRR)
Manage the complete Lead and Copper Rule compliance cycle: maintain your sampling pool of Tier 1 residential taps, schedule sampling events, import lead and copper results, calculate the 90th percentile value for action level comparison, track corrosion control treatment effectiveness, and manage the expanded requirements under the Lead and Copper Rule Revisions including service line inventories.
Stage 2 Disinfectants & Disinfection Byproducts Rule
Track total trihalomethanes (TTHM) and haloacetic acids (HAA5) at each monitoring location with locational running annual averages (LRAA). Software calculates the LRAA for each site and flags any location where the running average approaches or exceeds the MCL, giving operators time to adjust treatment before a violation occurs.
Revised Total Coliform Rule (RTCR)
Track monthly total coliform and E. coli sampling, calculate the percentage of positive samples against the MCL trigger, manage repeat sampling after positive detections, and document Level 1 and Level 2 assessments when triggered. Software ensures the correct number of routine and repeat samples are collected based on population served.
Surface Water Treatment Rules
For systems treating surface water or groundwater under the influence of surface water, track turbidity monitoring at individual filters and combined filter effluent, log CT (concentration × contact time) calculations for disinfection verification, and document filter performance relative to the treatment technique requirements.
PFAS Monitoring
EPA finalized national MCLs for PFOA, PFOS, and other PFAS compounds. Software tracks these ultra-low-level contaminants at parts per trillion alongside your existing monitoring program, with proper detection limit handling for the specialized analytical methods (EPA 533, 537.1) used for PFAS analysis.
Monitoring Schedule Management
Drinking water monitoring schedules are among the most complex in environmental compliance. A single system may have:
- Monthly — Total coliform, turbidity (continuous or daily for surface water), chlorine residual
- Quarterly — TTHM, HAA5, lead and copper (during monitoring periods), nitrate
- Annual — Nitrate (some systems), synthetic organics (some systems), radiological (some systems)
- Triennial — Inorganic chemicals, volatile organic chemicals (after initial rounds)
- Every 9 years — Synthetic organic chemicals (after reduced monitoring qualification)
Software tracks each schedule independently and generates a consolidated compliance calendar showing all upcoming sampling obligations across every regulated contaminant group.
Related Ecesis Solutions
Water Quality Software
Lab imports, data validation, permit tracking and DMR reporting.
Water & Wastewater
Comprehensive compliance for water utilities.
Utilities EHS
Safety and environmental for water and power utilities.
Compliance Obligations
Track all regulatory obligations and recurring deadlines.
Environmental Data
Sensor integration, statistical analysis and trend visualization.
Inspections & Audits
Mobile field inspections with corrective action tracking.
Ready to Simplify Drinking Water Compliance?
Call (720) 547-5102 or click below to see how Ecesis manages SDWA monitoring.
