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Second Mesa Day School - BIA

PWS ID: 090400057 · Second Mesa, 09 86043

Second Mesa Day School - BIA serves 366 people in Second Mesa, 09 using Groundwater water sources. It has 177 recorded EPA violations, including 34 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: Second Mesa Day School - BIA

Second Mesa Day School - BIA is a federal-owned community water system that delivers drinking water to 366 residents in Second Mesa, 09 through 17 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 177 total violations for this system , of which 34 (19%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 120 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Arsenic, recorded in 33 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across 09, EPA tracks 323 public water systems serving 555,721 people, with 48,296 cumulative violations and 3,354 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 149.5 violations. Second Mesa Day School - BIA's 177 violations sit above the 09 average. Statewide, 30 of 41 UCMR5-tested systems have reported PFAS detections (73.2%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
366
Total Violations
177
Health-Based Violations
34
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Federal
Connections
17
School/Daycare
Yes
MCL Violations
34
Monitoring Violations
120
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 33 2025
Public Notice Other 9 2025
Coliform (TCR) MR 8 2014
Arsenic MR 6 2020
Chlorine MR 4 2025
Nitrate MR 3 2024
Revised Total Coliform Rule MON 3 2024
Endrin MR 2 2011
BHC-GAMMA MR 2 2011
Dalapon MR 2 2011
Diquat MR 2 2011
Endothall MR 2 2011
Glyphosate MR 2 2011
Di(2-ethylhexyl) adipate MR 2 2011
OXAMYL MR 2 2011
Di(2-ethylhexyl) phthalate MR 2 2011
Simazine MR 2 2011
Hexachlorocyclopentadiene MR 2 2011
Carbofuran MR 2 2011
LASSO MR 2 2011
2,3,7,8-TCDD MR 2 2011
Heptachlor MR 2 2011
Heptachlor epoxide MR 2 2011
2,4-D MR 2 2011
2,4,5-TP MR 2 2011
HEXACHLOROBENZENE MR 2 2011
Benzo(a)pyrene MR 2 2011
Pentachlorophenol MR 2 2011
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2011
ETHYLENE DIBROMIDE MR 2 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 Second Mesa Day School - BIA.

Federal Source of Truth

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 090400057 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

09 Drinking Water Authority

09'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 09 regulator via EPA SDWIS

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
2025 Arsenic MCL 33 SDWIS / 090400057 / 1005
2025 Public Notice Other 9 SDWIS / 090400057 / 7500
2025 Chlorine MR 4 SDWIS / 090400057 / 0999
2024 Nitrate MR 3 SDWIS / 090400057 / 1040
2024 Revised Total Coliform Rule MON 3 SDWIS / 090400057 / 8000
2024 Consumer Confidence Rule Other 2 SDWIS / 090400057 / 7000
2020 Arsenic MR 6 SDWIS / 090400057 / 1005
2015 TTHM MR 2 SDWIS / 090400057 / 2950
2015 Total Haloacetic Acids (HAA5) MR 1 SDWIS / 090400057 / 2456
2014 Coliform (TCR) MR 8 SDWIS / 090400057 / 3100
2011 Endrin MR 2 SDWIS / 090400057 / 2005
2011 BHC-GAMMA MR 2 SDWIS / 090400057 / 2010
2011 Dalapon MR 2 SDWIS / 090400057 / 2031
2011 Diquat MR 2 SDWIS / 090400057 / 2032
2011 Endothall MR 2 SDWIS / 090400057 / 2033

How Second Mesa Day School - BIA Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Second Mesa Day School - BIA 09 avg Federal benchmark
Total violations 177 149.5 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 34 10.4 Indicates a contaminant exceeded a federal MCL
PFAS detection None 73.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 366 1,720 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 323 regulated public water systems in 09.

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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Second Mesa Day School - BIA water safe to drink? ▼
Second Mesa Day School - BIA (PWS ID: 090400057) has 177 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 366 people using Groundwater sources.
How many people does Second Mesa Day School - BIA serve? ▼
Second Mesa Day School - BIA serves 366 people in Second Mesa, 09. It is a Federal-owned system using Groundwater water sources with 17 service connections.
What type of violations does Second Mesa Day School - BIA have? ▼
Second Mesa Day School - BIA has 177 total violations: 34 health-based violations (MCL exceedances or treatment failures), 120 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Second Mesa Day School - BIA water? ▼
No PFAS testing data is available for Second Mesa Day School - BIA under the EPA's UCMR5 monitoring program.
What water source does Second Mesa Day School - BIA use? ▼
Second Mesa Day School - BIA uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial