Community Water System · PWS CO0212466
Lake Sanchez Estates
Alamosa, Colorado 81101 - drinking water served from groundwater sources to 34 people, tracked in EPA SDWIS and UCMR5.
- 34
- People served
- 800
- EPA violations
- 41
- Health-based
- Untested
- UCMR5 result
The verdict
EPA records 800 drinking-water violations at Lake Sanchez Estates, 5% of them health-based - above the Colorado per-system average.
- 800
- Total EPA violations on record
- 5%
- Health-based (MCL / treatment failure)
- 34
- People served by this system
- N/A
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: Lake Sanchez Estates
Lake Sanchez Estates is a private-owned community water system that delivers drinking water to 34 residents in Alamosa, Colorado (Costilla County) through 30 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 800 total violations for this system , of which 41 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 694 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 Public Notice, recorded in 48 violations (Other). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.
Across Colorado, EPA tracks 2,193 public water systems serving 7,473,456 people, with 238,796 cumulative violations and 30,589 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 108.9 violations. Statewide, 37 of 163 UCMR5-tested systems have reported PFAS detections (22.7%).
Lake Sanchez Estates's 800 violations sit above the Colorado 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
- Private
- Connections
- 30
- County
- Costilla
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 694
- Treatment Tech Violations
- 41
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Public Notice | Other | 48 | 2023 |
| Revised Total Coliform Rule | MON | 38 | 2024 |
| Groundwater Rule | TT | 30 | 2020 |
| Chlorine | MR | 21 | 2024 |
| Combined Radium (-226 and -228) | MR | 17 | 2020 |
| Combined Uranium | MR | 17 | 2020 |
| Gross Alpha, Excl. Radon and U | MR | 17 | 2020 |
| Nitrate | MR | 15 | 2022 |
| Toluene | MR | 14 | 2022 |
| 1,2,4-Trichlorobenzene | MR | 11 | 2022 |
| DICHLOROMETHANE | MR | 11 | 2022 |
| Vinyl chloride | MR | 11 | 2022 |
| trans-1,2-Dichloroethylene | MR | 11 | 2022 |
| 1,1,1-Trichloroethane | MR | 11 | 2022 |
| Carbon tetrachloride | MR | 11 | 2022 |
| Trichloroethylene | MR | 11 | 2022 |
| 1,1,2-Trichloroethane | MR | 11 | 2022 |
| Tetrachloroethylene | MR | 11 | 2022 |
| Xylenes, Total | MR | 11 | 2022 |
| o-Dichlorobenzene | MR | 11 | 2022 |
| 1,1-Dichloroethylene | MR | 11 | 2022 |
| 1,2-Dichloroethane | MR | 11 | 2022 |
| 1,2-Dichloropropane | MR | 11 | 2022 |
| Benzene | MR | 11 | 2022 |
| Ethylbenzene | MR | 11 | 2022 |
| Styrene | MR | 11 | 2022 |
| cis-1,2-Dichloroethylene | MR | 11 | 2022 |
| CHLOROBENZENE | MR | 11 | 2022 |
| Fluoride | MR | 11 | 2020 |
| p-Dichlorobenzene | MR | 11 | 2022 |
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 Sanchez Estates.
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 CO0212466 on SDWISSource: EPA SDWIS Federal Reports Search
Colorado Drinking Water Authority
Colorado Department of Public Health and Environment, Water Quality Control is the primacy agency that licenses and inspects Lake Sanchez Estates under EPA-delegated authority.
Open CO regulator portalSource: Colorado Department of Public Health and Environment, Water Quality Control
Violation 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 | Revised Total Coliform Rule | MON | 38 | SDWIS / CO0212466 / 8000 |
| 2024 | Chlorine | MR | 21 | SDWIS / CO0212466 / 0999 |
| 2024 | Lead and Copper Rule | MR | 9 | SDWIS / CO0212466 / 5000 |
| 2024 | Consumer Confidence Rule | Other | 3 | SDWIS / CO0212466 / 7000 |
| 2023 | Public Notice | Other | 48 | SDWIS / CO0212466 / 7500 |
| 2023 | Revised Total Coliform Rule | Other | 7 | SDWIS / CO0212466 / 8000 |
| 2022 | Nitrate | MR | 15 | SDWIS / CO0212466 / 1040 |
| 2022 | Toluene | MR | 14 | SDWIS / CO0212466 / 2991 |
| 2022 | 1,2,4-Trichlorobenzene | MR | 11 | SDWIS / CO0212466 / 2378 |
| 2022 | DICHLOROMETHANE | MR | 11 | SDWIS / CO0212466 / 2964 |
| 2022 | Vinyl chloride | MR | 11 | SDWIS / CO0212466 / 2976 |
| 2022 | trans-1,2-Dichloroethylene | MR | 11 | SDWIS / CO0212466 / 2979 |
| 2022 | 1,1,1-Trichloroethane | MR | 11 | SDWIS / CO0212466 / 2981 |
| 2022 | Carbon tetrachloride | MR | 11 | SDWIS / CO0212466 / 2982 |
| 2022 | Trichloroethylene | MR | 11 | SDWIS / CO0212466 / 2984 |
How Lake Sanchez Estates Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | Lake Sanchez Estates | Colorado avg | Federal benchmark |
|---|---|---|---|
| Total violations | 800 | 108.9 | SDWA compliance, any non-zero count is a recorded breach |
| Health-based violations | 41 | 13.9 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 22.7% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 34 | 3,408 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,193 regulated public water systems in Colorado.
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 Sanchez Estates water safe to drink? ▼
How many people does Lake Sanchez Estates serve? ▼
What type of violations does Lake Sanchez Estates have? ▼
Has PFAS been detected in Lake Sanchez Estates water? ▼
What water source does Lake Sanchez Estates 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.