Year three of the Greensboro Special Order by Consent (SOC) addressing 1,4-dioxane ended April 30, 2024. However, the Water Resources Department continues voluntary monitoring and working with industries to maintain our progress. 

See continued sampling results below (May 1, 2025 - Current):

Upstream and Downstream of T.Z. Osborne (TZO) Effluent Sample Results

TriRiver Water (formerly Town of Pittsboro) Sample Results

Upper Haw River Arm of Jordan Lake Sample Results

City National Pollutant Discharge Elimination System (NPDES)
Electronic Discharge Monitoring Reports (eDMR) Self-Monitoring

 
Voluntary Activities Details Beginning May 1, 2024:

1. Continue effluent reporting related to effluent discharges for the following activities:

a. Weekly T.Z. Osborne (TZO) effluent eDMR grab sample monitoring.
b. Report all TZO effluent 1,4-dioxane samples on eDMR and in update email to 70+ recipients.
c. Report within 24 hours to the NC Department of Environmental Quality (NCDEQ) and notify downstream utilities if result >23 ug/L (SOC Year 3 Compliance Value).

2. Continue the following Pretreatment Program Activities:

a. Modify Significant Industrial User (SIU) permits or develop/maintain other pretreatment program mechanisms as necessary.
b. SIU Permit application follow-up for industrial facilities that indicate 1,4-dioxane is “present.”
c. Require select SIUs to collect and retain daily samples.

3. Continue the following sampling and monitoring activities:

a. Surface water: Pittsboro drinking water intake (weekly)*
b. Surface water: Haw River Arm of Jordan Lake (twice per month)*
c. T.Z. Osborne influent composite (weekly)
d. Surveillance monitoring in wastewater collection system
e. Retain weekly TZO composite of daily effluent samples

*Sampling conducted by/dependent on outside entities: TriRiver Water (formerly Town of Pittsboro) and Meritech Lab.