Community Water System · PWS NM3508817
Thoreau Water & Sanitation District
Thoreau, New Mexico 87323 - drinking water served from groundwater sources to 1,173 people, tracked in EPA SDWIS and UCMR5.
- 1,173
- People served
- 117
- EPA violations
- 31
- Health-based
- Untested
- UCMR5 result
The verdict
EPA records 117 drinking-water violations at Thoreau Water & Sanitation District, 26% of them health-based - below the New Mexico per-system average.
- 117
- Total EPA violations on record
- 26%
- Health-based (MCL / treatment failure)
- 1,173
- People served by this system
- N/A
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: Thoreau Water & Sanitation District
Thoreau Water & Sanitation District is a local-owned community water system that delivers drinking water to 1,173 residents in Thoreau, New Mexico (McKinley County) through 345 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 117 total violations for this system , of which 31 (26%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 65 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 Chlorine, recorded in 27 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.
Across New Mexico, EPA tracks 1,037 public water systems serving 2,027,497 people, with 154,522 cumulative violations and 38,650 health-based violations on record. About 97% of systems in the state carry at least one violation, and state-wide the average per system is 149 violations. Statewide, 70 of 72 UCMR5-tested systems have reported PFAS detections (97.2%).
Thoreau Water & Sanitation District's 117 violations sit below the New Mexico 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
- Community
- Owner Type
- Local
- Connections
- 345
- County
- McKinley
- School/Daycare
- No
- MCL Violations
- 22
- Monitoring Violations
- 65
- Treatment Tech Violations
- 9
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 27 | 2019 |
| Combined Radium (-226 and -228) | MCL | 15 | 2014 |
| Total Haloacetic Acids (HAA5) | MR | 12 | 2015 |
| TTHM | MR | 12 | 2015 |
| Consumer Confidence Rule | Other | 7 | 2024 |
| Groundwater Rule | TT | 6 | 2024 |
| Lead and Copper Rule | MR | 6 | 2024 |
| Coliform (TCR) | MCL | 4 | 2006 |
| Asbestos | MR | 4 | 2011 |
| E. COLI | MR | 4 | 2017 |
| LEAD AND COPPER RULE REVISIONS | TT | 3 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 3 | 2024 |
| Gross Alpha, Excl. Radon and U | MCL | 3 | 1986 |
| Groundwater Rule | Other | 3 | 2024 |
| Public Notice | Other | 1 | 2016 |
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 Thoreau Water & Sanitation District.
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 NM3508817 on SDWISSource: EPA SDWIS Federal Reports Search
New Mexico Drinking Water Authority
New Mexico'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 NM 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 | Consumer Confidence Rule | Other | 7 | SDWIS / NM3508817 / 7000 |
| 2024 | Groundwater Rule | TT | 6 | SDWIS / NM3508817 / 0700 |
| 2024 | Lead and Copper Rule | MR | 6 | SDWIS / NM3508817 / 5000 |
| 2024 | LEAD AND COPPER RULE REVISIONS | TT | 3 | SDWIS / NM3508817 / 5200 |
| 2024 | LEAD AND COPPER RULE REVISIONS | RPT | 3 | SDWIS / NM3508817 / 5200 |
| 2024 | Groundwater Rule | Other | 3 | SDWIS / NM3508817 / 0700 |
| 2019 | Chlorine | MR | 27 | SDWIS / NM3508817 / 0999 |
| 2017 | E. COLI | MR | 4 | SDWIS / NM3508817 / 3014 |
| 2016 | Public Notice | Other | 1 | SDWIS / NM3508817 / 7500 |
| 2015 | Total Haloacetic Acids (HAA5) | MR | 12 | SDWIS / NM3508817 / 2456 |
| 2015 | TTHM | MR | 12 | SDWIS / NM3508817 / 2950 |
| 2014 | Combined Radium (-226 and -228) | MCL | 15 | SDWIS / NM3508817 / 4010 |
| 2011 | Asbestos | MR | 4 | SDWIS / NM3508817 / 1094 |
| 2006 | Coliform (TCR) | MCL | 4 | SDWIS / NM3508817 / 3100 |
| 1986 | Gross Alpha, Excl. Radon and U | MCL | 3 | SDWIS / NM3508817 / 4000 |
How Thoreau Water & Sanitation District Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | Thoreau Water & Sanitation District | New Mexico avg | Federal benchmark |
|---|---|---|---|
| Total violations | 117 | 149 | SDWA compliance, any non-zero count is a recorded breach |
| Health-based violations | 31 | 37.3 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 97.2% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 1,173 | 1,955 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,037 regulated public water systems in New Mexico.
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 Thoreau Water & Sanitation District water safe to drink? ▼
How many people does Thoreau Water & Sanitation District serve? ▼
What type of violations does Thoreau Water & Sanitation District have? ▼
Has PFAS been detected in Thoreau Water & Sanitation District water? ▼
What water source does Thoreau Water & Sanitation District 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.