Stillwater Utilities Authority
EPA ID: OK1021220 · 53,000 people served · 7 ZIP codes
ZipCheckup's reading of EPA SDWIS for Stillwater Utilities Authority (OK1021220): 6 past health-based violations, since resolved. Five years tracked: Stillwater Utilities Authority had 6 violations, all cleared, 53,000 served.
Data: EPA SDWIS
Service Area Map
Coverage area for Stillwater Utilities Authority Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Stillwater Utilities Authority serves a community with a median household income of $61,250 and an estimated 63,824 residents across its service area.
Environmental Justice Note: 35% 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?
Stillwater Utilities 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 Stillwater Utilities Authority compares to EPA limits
What This Means For You
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.
E. coli at 2 Zero tolerance (any positive sample triggers immediate action) exceeds the EPA maximum of Zero tolerance (any positive sample triggers immediate action). Severe GI illness; potentially fatal kidney failure in children. Consider UV disinfection (99.99%) filtration.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 6 detections recorded. 1 exceeds federal EPA limits (4 ppt for PFOA/PFOS).
Chlorite was detected in this water system. ferrous sulfate reduction filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
Similar-sized systems in Oklahoma
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
Stillwater Utilities Authority (EPA ID: OK1021220) is a community water system in Oklahoma that serves approximately 53,000 people from surface water sources.
This system provides water to 7 ZIP codes across 4 communities.
Violation History
Status breakdown for accepted records with record years 2021-2026: 6 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 |
|---|---|---|---|
| February 1, 2023 | E. coli | Health-based | Resolved |
| February 1, 2023 | E. coli | Health-based | Resolved |
| October 1, 2022 | Chlorite | Health-based | Resolved |
| July 1, 2022 | Chlorite | Health-based | Resolved |
| January 1, 2022 | Chlorite | Health-based | Resolved |
| October 1, 2021 | Chlorite | 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 | Yes |
| E. coli | Microbiological | 2 | Yes |
Health Risk Details
Chlorite (EPA limit: 1 mg/L)
Anemia and nervous system effects in infants and children At-risk groups: infants, developing fetuses, people with G6PD deficiency.
Removal methods: ferrous sulfate reduction, activated carbon, reverse osmosis. Find the right filter →
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 |
|---|---|---|
| 0.0021 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 3 (Low Risk)
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.
- 73063 - Mulhall
- 73073 - Orlando
- 74032 - Glencoe
- 74074 - Stillwater
- 74075 - Stillwater
- 74077 - Stillwater
- 74078 - Stillwater
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Stillwater Utilities Authority (OK1021220) on EPA.gov.
Frequently Asked Questions
Is Stillwater Utilities Authority water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Stillwater Utilities Authority; its 6 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Stillwater Utilities Authority serve?
Stillwater Utilities Authority serves approximately 53,000 people across 7 ZIP codes in Oklahoma.
Where does Stillwater Utilities Authority get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected below the current state-enforceable MCL.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Stillwater Utilities Authority (OK): 6 Health Violations. https://zipcheckup.com/water-system/ok1021220/
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title = {{Stillwater Utilities Authority (OK): 6 Health Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ok1021220/}
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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
Stillwater Utilities Authority (EPA ID: OK1021220) - request the latest Consumer Confidence Report or ask about specific contaminants.