Water Quality in Spiro, OK: 44 Violations — Grade C
Grade C · Score 59/100 · 3 water systems · Updated 2026-05-03
Spiro's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
The compliance history for Spiro, OK includes 44 water violations on file with the EPA — a federal tally that spans health-based exceedances, monitoring failures, and enforcement actions logged under the Safe Drinking Water Act.
Water Quality by ZIP Code in Spiro
Water quality varies across Spiro's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 74959 | C | 59 | 44 | 25 | View report → |
Violation Trend
EPA violations recorded for water systems serving Spiro.
Water Quality Overview
Spiro, Oklahoma receives a water quality grade of C with an overall score of 59 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 3 water systems serving Spiro have accumulated 44 EPA violations, including 25 health-based violations. These violations are tracked across 1 ZIP codes serving approximately 13,094 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Spiro's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
The average 90th percentile lead level across Spiro water systems is 0.0094 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 47% of homes built before 1986, Spiro has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.
Water Systems Serving Spiro
Spiro is served by 3 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 13,094 people across 1 ZIP codes.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 10 enforcement actions against water systems serving Spiro. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Spiro
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
Request your CCR — your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test — certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration — NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories — monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Spiro Water Systems
The following contaminants have been detected or caused violations across Spiro's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 27 | 1 | Yes |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 8 | 1 | Yes |
| Stage 2 DBP Rule | Treatment Technique | N/A | 4 | 1 | Yes |
| Surface Water Treatment Rule | Treatment Technique | N/A | 2 | 1 | No |
| Revised Total Coliform Rule | Microbiological | N/A | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
Violation Trend Over Time
Year-by-year EPA violations recorded for water systems serving Spiro:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2023 | 6 | 6 |
| 2024 | 5 | 5 |
| 2025 | 4 | 4 |
Violations have decreased from 6 in 2023 to 4 in 2025, indicating improving compliance.
EPA Enforcement History
The EPA and state regulators have taken 9 enforcement actions against water systems serving Spiro. Recent actions:
| Date | Action Type |
|---|---|
| 2025-09-26 | State Order Extension |
| 2025-07-29 | State Informal Action |
| 2025-07-22 | State Informal Action |
| 2025-07-22 | State Informal Enforcement |
| 2025-07-11 | State Informal Action |
| 2025-07-01 | State Order Extension |
| 2025-06-27 | State Informal Action |
| 2025-06-27 | State Informal Enforcement |
| 2025-06-03 | State Informal Action |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-09-26.
Spiro vs. Nearby Oklahoma Cities
How Spiro's water quality compares to similar cities in Oklahoma:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Spiro | C | 44 | 3 | 13,094 |
| Eufaula | B | 45 | 4 | 13,284 |
| Marble City | D | 0 | 1 | 13,460 |
| Glenpool | B | 2 | 1 | 12,500 |
Common Questions About Spiro Water
These are the most common questions residents search for about water quality in Spiro, Oklahoma:
Is Spiro water hard or soft? Water hardness varies by source. Spiro's 3 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Spiro tap water? Spiro's water receives a grade of C (59/100). There are 25 health-based violations — consider filtration.
What is the best water filter for Spiro? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Spiro vs. Oklahoma Average
Understanding how Spiro compares to the broader Oklahoma average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below — water quality can vary significantly even within Spiro.
ZIP Codes in Spiro
Spiro spans 1 ZIP code. The ZIP with the lowest water quality score is 74959. Each ZIP code has its own water quality profile based on the specific water system serving that area. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Updated daily.