South Delaware Company Regional Water Authority
EPA ID: OK1221645 · 1,500 people served · 4 ZIP codes
ZipCheckup's reading of EPA SDWIS for South Delaware Company Regional Water Authority (OK1221645): 3 past health-based violations, since resolved. Even though South Delaware Company Regional Water Authority accumulated 12 violations over five years, all have been formally resolved - the provider currently meets EPA standards for 1,500 people.
Data: EPA SDWIS
Service Area Map
Coverage area for South Delaware Company Regional Water Authority Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The South Delaware Company Regional Water Authority serves a community with a median household income of $46,175 and an estimated 18,173 residents across its service area. Approximately 49% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 100% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
🌊 Where Does Your Water Come From?
South Delaware Company Regional Water Authority's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Infrastructure Risk
Detected Contaminants
How South Delaware Company Regional Water Authority compares to EPA limits
What This Means For You
Haloacetic Acids (HAA5) at 1 mg/L exceeds the EPA maximum of 0.06 mg/L. Cancer risk; reproductive & developmental effects. Consider granular activated carbon (GAC) filtration.
Total Trihalomethanes (TTHM) at 1 mg/L exceeds the EPA maximum of 0.08 mg/L. Bladder & rectal cancer risk; reproductive concerns. Consider granular activated carbon (GAC) filtration.
Chlorite at 4 mg/L exceeds the EPA maximum of 1 mg/L. Anemia and nervous system effects in infants and children. Consider ferrous sulfate reduction filtration.
Stage 2 DBP Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Surface Water Treatment Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Haloacetic Acids (HAA5) was detected in this water system. granular activated carbon (GAC) filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
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Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
South Delaware Company Regional Water Authority (EPA ID: OK1221645) is a community water system in Oklahoma that serves approximately 1,500 people from surface water sources.
This system provides water to 4 ZIP codes across 4 communities.
Violation History
Status breakdown for accepted records with record years 2021-2026: 12 resolved, 0 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Non-health-based | Resolved |
| August 1, 2024 | Chlorite | Non-health-based | Resolved |
| August 1, 2024 | Chlorite | Non-health-based | Resolved |
| July 1, 2024 | Surface Water Treatment Rule | Non-health-based | Resolved |
| March 1, 2024 | E. coli | Health-based | Resolved |
| July 1, 2023 | Chlorite | Non-health-based | Resolved |
| July 1, 2023 | Chlorite | Non-health-based | Resolved |
| January 1, 2023 | Haloacetic Acids (HAA5) | Non-health-based | Resolved |
| January 1, 2023 | Total Trihalomethanes (TTHM) | Non-health-based | Resolved |
| December 1, 2022 | Fecal Coliform | Health-based | Resolved |
| October 1, 2022 | Revised Total Coliform Rule | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Chlorite | Disinfection Byproducts | 4 | No |
| Stage 2 DBP Rule | Treatment Failure | 2 | Yes |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 1 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 1 | No |
| Surface Water Treatment Rule | Treatment Failure | 1 | No |
| E. coli | Microbiological | 1 | Yes |
| Fecal Coliform | Microbiological | 1 | Yes |
| Revised Total Coliform Rule | Microbiological | 1 | No |
Health Risk Details
E. coli (EPA limit: Zero tolerance (any positive sample triggers immediate action))
Severe GI illness; potentially fatal kidney failure in children At-risk groups: children under 5, elderly, immunocompromised individuals, pregnant women.
Removal methods: UV disinfection (99.99%), chlorination, reverse osmosis. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0018 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by OK or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for South Delaware Company Regional Water Authority (OK1221645) on EPA.gov.
Frequently Asked Questions
Is South Delaware Company Regional Water Authority water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for South Delaware Company Regional Water Authority; its 12 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does South Delaware Company Regional Water Authority serve?
South Delaware Company Regional Water Authority serves approximately 1,500 people across 4 ZIP codes in Oklahoma.
Where does South Delaware Company Regional Water Authority get its water?
The primary water source is surface water.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). South Delaware Company Regional Water Authority, OK. https://zipcheckup.com/water-system/ok1221645/
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title = {{South Delaware Company Regional Water Authority, OK}},
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url = {https://zipcheckup.com/water-system/ok1221645/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
South Delaware Company Regional Water Authority (EPA ID: OK1221645) - request the latest Consumer Confidence Report or ask about specific contaminants.