Transient Non-Community Water System · PWS OK2001421
Lake Thunderbird Sp Little Axe Area
Norman, Oklahoma 73026-8605 - drinking water served from groundwater sources to 500 people, tracked in EPA SDWIS and UCMR5.
- 500
- People served
- 20
- EPA violations
- 0
- Health-based
- Untested
- UCMR5 result
The verdict
EPA records 20 drinking-water violations at Lake Thunderbird Sp Little Axe Area - below the Oklahoma per-system average.
- 20
- Total EPA violations on record
- 0%
- Health-based (MCL / treatment failure)
- 500
- People served by this system
- N/A
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: Lake Thunderbird Sp Little Axe Area
Lake Thunderbird Sp Little Axe Area is a state-owned transient non-community water system that delivers drinking water to 500 residents in Norman, Oklahoma (Cleveland County) through 8 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 20 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 19 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.
The most frequently cited contaminant at this system is Revised Total Coliform Rule, recorded in 10 violations (MON). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.
Across Oklahoma, EPA tracks 1,262 public water systems serving 3,699,452 people, with 336,706 cumulative violations and 113,804 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 266.8 violations. Statewide, 101 of 166 UCMR5-tested systems have reported PFAS detections (60.8%).
Lake Thunderbird Sp Little Axe Area's 20 violations sit below the Oklahoma average.
All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.
System Details
- System Type
- Transient Non-Community
- Owner Type
- State
- Connections
- 8
- County
- Cleveland
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 19
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | MON | 10 | 2022 |
| Coliform (TCR) | MR | 4 | 2011 |
| Nitrate-Nitrite | MR | 4 | 2024 |
| E. COLI | MR | 1 | 2011 |
Verify This Water System
The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Lake Thunderbird Sp Little Axe Area.
EPA SDWIS, Federal Reports
EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:
View PWS ID OK2001421 on SDWISSource: EPA SDWIS Federal Reports Search
Oklahoma Drinking Water Authority
Oklahoma's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.
Find OK regulator via EPA SDWISViolation Timeline
Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.
| Year (latest) | Contaminant | Category | Count | EPA Record |
|---|---|---|---|---|
| 2024 | Nitrate-Nitrite | MR | 4 | SDWIS / OK2001421 / 1038 |
| 2022 | Revised Total Coliform Rule | MON | 10 | SDWIS / OK2001421 / 8000 |
| 2011 | Coliform (TCR) | MR | 4 | SDWIS / OK2001421 / 3100 |
| 2011 | E. COLI | MR | 1 | SDWIS / OK2001421 / 3014 |
How Lake Thunderbird Sp Little Axe Area Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | Lake Thunderbird Sp Little Axe Area | Oklahoma avg | Federal benchmark |
|---|---|---|---|
| Total violations | 20 | 266.8 | SDWA compliance, any non-zero count is a recorded breach |
| Health-based violations | 0 | 90.2 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 60.8% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 500 | 2,931 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,262 regulated public water systems in Oklahoma.
Federal MCL reference, Safe Drinking Water Act thresholds ▼
| Contaminant | Federal MCL / Action Level | Note |
|---|---|---|
| Lead | 0 mg/L (Action Level: 0.015 mg/L) | Lead and Copper Rule treatment technique |
| Arsenic | 0.010 mg/L (10 ppb) | Health-based MCL since 2006 |
| Total Coliform | Treatment technique (RTCR) | Indicator organism, monitoring trigger |
| PFOA / PFOS (PFAS) | 4.0 ppt each (final 2024 rule) | Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026) |
| Nitrate (as N) | 10 mg/L | Acute health risk for infants |
Frequently Asked Questions
Is Lake Thunderbird Sp Little Axe Area water safe to drink? ▼
How many people does Lake Thunderbird Sp Little Axe Area serve? ▼
What type of violations does Lake Thunderbird Sp Little Axe Area have? ▼
Has PFAS been detected in Lake Thunderbird Sp Little Axe Area water? ▼
What water source does Lake Thunderbird Sp Little Axe Area use? ▼
Where does this data come from? ▼
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.