1.4 Virginia Drinking Water & Wastewater Environmental Governance
Key Takeaways
- Virginia operates under a tripartite regulatory framework: DPOR regulates individual operator licensing, VDH enforces public drinking water standards under 12 VAC 5-590, and DEQ governs wastewater discharge permits under 9 VAC 25-31.
- VDH Waterworks Regulations enforce primary Maximum Contaminant Levels (MCLs) and the Lead and Copper Rule, which establishes a Lead Action Level of 0.015 mg/L (15 ppb) and a Copper Action Level of 1.3 mg/L (1,300 ppb) at the 90th percentile.
- DEQ regulates point-source wastewater discharges through Virginia Pollutant Discharge Elimination System (VPDES) permits, requiring routine Discharge Monitoring Report (DMR) submissions.
- Under 9 VAC 25-31-190, any unpermitted discharge, sanitary sewer overflow (SSO), spill, or treatment bypass must be reported orally to the DEQ regional office within 24 hours, followed by a written report within 5 days.
- Facilities in the Chesapeake Bay watershed are governed by stringent Total Maximum Daily Load (TMDL) nutrient caps and annual mass waste load allocations for Total Nitrogen (TN) and Total Phosphorus (TP).
Virginia Drinking Water & Wastewater Environmental Governance
Water and wastewater operators in Virginia work within a structured, multi-agency regulatory ecosystem. While DPOR regulates the individual operator's professional credential, two distinct state agencies govern the physical facilities, environmental permits, and compliance standards: the Virginia Department of Health (VDH) for drinking water and the Department of Environmental Quality (DEQ) for wastewater and water resources.
1. Tripartite Governance Architecture
Understanding which state agency possesses jurisdiction over specific facilities, permits, and violations is critical for both daily operational compliance and the certification examination.
COMMONWEALTH OF VIRGINIA ENVIRONMENTAL GOVERNANCE
+-----------------------+-------------------------+-------------------------+
| DPOR | VDH | DEQ |
| (WWWOOSSP Board) | (Office of Drink. Water)| (State Water Control Bd)|
+-----------------------+-------------------------+-------------------------+
| * Operator Licensure | * Safe Drinking Water | * Clean Water Act |
| * Individual Ethics | Act Primacy (SDWA) | Primacy (NPDES/VPDES) |
| * CPE Compliance | * Waterworks Permitting | * VPDES Discharge Stds |
| * License Sanctions | * Primary / Sec. MCLs | * VPA Pollution Permits |
| * 18 VAC 160-30 | * 12 VAC 5-590 | * 9 VAC 25-31 / TMDLs |
+-----------------------+-------------------------+-------------------------+
- DPOR (WWWOOSSP Board): Regulates the individual operator (competency, credentials, discipline).
- VDH (Office of Drinking Water - ODW): Regulates drinking water infrastructure to protect public health under the Virginia Waterworks Regulations (12 VAC 5-590).
- DEQ (State Water Control Board): Regulates wastewater discharges, surface water quality, and groundwater withdrawals under the State Water Control Law and 9 VAC 25-31.
2. VDH Drinking Water Governance (12 VAC 5-590)
Under delegated authority from the US EPA under the Safe Drinking Water Act (SDWA), the Virginia Department of Health (VDH) Office of Drinking Water establishes and enforces public water system standards.
Public Water System Classifications
- Community Water System (CWS): Serves at least 15 service connections used by year-round residents or regularly serves at least 25 year-round residents (e.g., municipal water utilities, residential subdivisions).
- Non-Transient Non-Community Water System (NTNC): Regularly serves at least 25 of the same persons over 6 months per year (e.g., schools, factories, hospitals with their own well systems).
- Transient Non-Community Water System (TNC): Serves at least 25 persons daily for at least 60 days per year, but not the same individuals (e.g., campgrounds, highway rest areas, rural gas stations).
Drinking Water Quality Standards: Primary vs. Secondary MCLs
- Primary Maximum Contaminant Levels (MCLs): Legally enforceable, health-based standards designed to protect against acute and chronic health hazards. Examples include inorganic chemicals (nitrate at $10\text{ mg/L}$ as N, nitrite at $1.0\text{ mg/L}$, arsenic at $0.010\text{ mg/L}$), synthetic organic chemicals (pesticides, VOCs), disinfection byproducts (Total Trihalomethanes [TTHM] at $0.080\text{ mg/L}$, Haloacetic Acids [HAA5] at $0.060\text{ mg/L}$), and radionuclides (gross alpha at $15\text{ pCi/L}$). Total coliform violations trigger assessment and corrective action under the Revised Total Coliform Rule (RTCR).
- Secondary Maximum Contaminant Levels (SMCLs): Non-enforceable aesthetic and cosmetic guidelines regarding taste, odor, color, and staining. Examples include iron ($0.3\text{ mg/L}$), manganese ($0.05\text{ mg/L}$), pH ($6.5\text{ to }8.5$), and Total Dissolved Solids (TDS at $500\text{ mg/L}$).
Surface Water Treatment Rule (SWTR) Mandates
Surface water and groundwater under the direct influence of surface water (GWUDI) must achieve mandatory pathogen removal and log-inactivation credits:
- Giardia lamblia: >= 3-log (99.9%) removal and/or inactivation.
- Enteric Viruses: >= 4-log (99.99%) removal and/or inactivation.
- Cryptosporidium: >= 2-log (99%) physical removal credit via granular media or membrane filtration.
- Turbidity Limits: Combined filter effluent (CFE) turbidity must be <= 0.3 NTU in at least 95% of measurements taken each month, and must never exceed 1.0 NTU at any time.
Lead and Copper Rule Standards, and the LCRI Change Ahead
Unlike other contaminants evaluated via running annual averages, lead and copper are regulated via Action Levels (AL) evaluated at the 90th percentile of first-draw customer tap samples after a minimum 6-hour stagnation period:
Lead Action Level = 0.015 mg/L (15 ppb)
Copper Action Level = 1.3 mg/L (1,300 ppb)
Exceeding an Action Level triggers mandatory Optimal Corrosion Control Treatment (OCCT) studies, public education campaigns, water quality parameter (WQP) monitoring, and lead service line replacement programs.
Know which number is operative today. The 0.015 mg/L lead action level above is the figure in force in 2026. EPA's Lead and Copper Rule Improvements (LCRI), finalized in October 2024, lowers the lead action level to 0.010 mg/L and adds a separate 0.015 mg/L "lead exceedance" trigger, but those provisions carry a compliance date of November 1, 2027. Until then, systems comply with the Lead and Copper Rule Revisions. The copper action level of 1.3 mg/L is unchanged by the LCRI.
3. DEQ Wastewater Governance & VPDES Permitting (9 VAC 25-31)
The Department of Environmental Quality (DEQ) administers the Virginia Pollutant Discharge Elimination System (VPDES) program under delegated National Pollutant Discharge Elimination System (NPDES) Clean Water Act authority.
VPDES Permit Structure & Effluent Limitations
Every facility discharging effluent into Virginia surface waters must hold an active VPDES permit. Permits establish strict numeric effluent limits:
| Effluent Parameter | Technology-Based Standard (Secondary Treatment) | Advanced / Water Quality-Based Limits |
|---|---|---|
| Biochemical Oxygen Demand (BOD5 / CBOD5) | 30 mg/L monthly avg / 45 mg/L weekly avg (85% removal min) | 5.0 to 10.0 mg/L CBOD5 in nutrient-sensitive waters. |
| Total Suspended Solids (TSS) | 30 mg/L monthly avg / 45 mg/L weekly avg (85% removal min) | 5.0 to 10.0 mg/L TSS. |
| pH Range | 6.0 to 9.0 Standard Units (SU) | 6.0 to 9.0 SU (stream-specific buffer). |
| Dissolved Oxygen (DO) | Not mandated in basic secondary | >= 5.0 to 7.0 mg/L min at discharge point. |
| Bacteria (E. coli / Enterococci) | 126 CFU/100 mL geometric mean (235 single sample) | Strict seasonal or continuous disinfection mandates. |
| Total Residual Chlorine (TRC) | Typically limited at or below the permit quantification level; VPDES permits commonly set the compliance floor at 0.10 mg/L reported as non-detect | Water-quality-based limits in sensitive receiving waters approach EPA chronic aquatic-life criteria; dechlorination with sulfur dioxide or sodium bisulfite required. |
Discharge Monitoring Reports (DMR)
Facilities must submit monthly or quarterly electronic DMRs (eDMR) to DEQ documenting all daily composite and grab sample results, flow volumes, and loading rates. The ORC and authorized facility official must sign each DMR under certification of strict data integrity.
4. Mandatory Bypass & Spill Reporting Protocols (9 VAC 25-31-190)
Unplanned operational failures, treatment unit upsets, and collection system failures present severe risks to aquatic life and downstream drinking water intakes. DEQ enforces strict emergency notification timelines.
The 24-Hour Oral / 5-Day Written Rule
Under 9 VAC 25-31-190.L, any unauthorized discharge, sanitary sewer overflow (SSO), hazardous chemical spill, or treatment bypass that violates permit conditions must be reported according to the following strict timeline:
- Oral / Electronic Report Within 24 Hours: The facility operator or designated representative must notify the appropriate DEQ Regional Office within 24 hours of becoming aware of the incident. If the discharge threatens public health or downstream drinking water supplies, VDH and local emergency management must also be notified immediately.
- Detailed Written Report Within 5 Days: A formal, comprehensive written report must be submitted to DEQ within five (5) calendar days of becoming aware of the incident.
UNPERMITTED DISCHARGE / SSO / BYPASS EVENT
|
v
[0 to 24 Hours] -> ORAL NOTIFICATION to DEQ Regional Office
(Description, Location, Est. Volume, Cause)
|
v
[Within 5 Days] -> WRITTEN REPORT SUBMITTED to DEQ
* Exact dates, times, and duration
* Corrective steps taken to stop and clean up spill
* Long-term mitigation plan to prevent recurrence
5. Chesapeake Bay TMDL & Nutrient General Permitting
Virginia's water resources drain extensively into the Chesapeake Bay watershed. Under the EPA Chesapeake Bay Total Maximum Daily Load (TMDL), point-source wastewater discharges are governed by aggressive nutrient reduction mandates to eliminate hypoxic "dead zones" caused by algal blooms.
Nutrient Limits & Waste Load Allocations (WLAs)
Wastewater facilities operating within the Chesapeake Bay watershed are subject to the Chesapeake Bay Watershed Nutrient General Permit (9 VAC 25-820). Facilities receive annual aggregate Waste Load Allocations (WLAs) for:
- Total Nitrogen (TN): Expressed as annual pounds discharged per year ((Concentration) x (Flow) x 8.34 x 365).
- Total Phosphorus (TP): Expressed as annual pounds discharged per year.
Treatment Technology Tiers
- Biological Nutrient Removal (BNR): Designed to achieve effluent concentrations of TN < 8.0 mg/L and TP < 1.0 mg/L.
- Enhanced Nutrient Removal (ENR): Advanced facilities operating denitrification filters and chemical phosphorus polishing to achieve effluent concentrations of TN < 3.0 to 4.0 mg/L and TP < 0.18 to 0.30 mg/L.
The Virginia Nutrient Credit Exchange Association
Facilities that reduce nutrient discharges below their assigned WLAs generate nutrient credits. Facilities experiencing operational challenges or undergoing capital expansions may purchase compliance credits through the Virginia Nutrient Credit Exchange to meet their annual permit allocations, ensuring total watershed nutrient caps are never exceeded.
Under VDH Waterworks Regulations (12 VAC 5-590) and the Lead and Copper Rule, what are the regulatory Action Levels for lead and copper evaluated at the 90th percentile of customer tap samples?
An unpermitted sanitary sewer overflow (SSO) of 15,000 gallons occurs at a municipal collection system lift station. Under 9 VAC 25-31-190, what is the mandatory notification requirement to DEQ?
Which Virginia agency is responsible for issuing Waterworks Operation Permits and enforcing Maximum Contaminant Levels (MCLs) for public drinking water supplies?
Under the Chesapeake Bay Watershed Nutrient General Permit (9 VAC 25-820), which two nutrient parameters are regulated with annual mass Waste Load Allocations (WLAs) to prevent eutrophication?