PlainWater
States → 09

Polacca

PWS ID: 090400106 · Polacca, 09 86042

Polacca serves 4,108 people in Polacca, 09 using Groundwater water sources. It has 473 recorded EPA violations, including 126 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: Polacca

Polacca is a native american-owned community water system that delivers drinking water to 4,108 residents in Polacca, 09 through 450 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 473 total violations for this system , of which 126 (27%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 283 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 Arsenic, recorded in 117 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 34.1 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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. Polacca's 473 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.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
4,108
Total Violations
473
Health-Based Violations
126
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
450
School/Daycare
No
MCL Violations
124
Monitoring Violations
283
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 117 2023
Arsenic MR 29 2022
Coliform (TCR) MR 26 2015
Public Notice Other 15 2022
Nitrate MR 12 2022
Chlorine MR 8 2023
Coliform (TCR) MCL 7 2009
Total Haloacetic Acids (HAA5) MR 6 2015
TTHM MR 6 2015
E. COLI MR 6 2023
Glyphosate MR 4 2020
Picloram MR 4 2020
2,4-D MR 4 2020
Benzo(a)pyrene MR 4 2020
Barium MR 3 2011
Cadmium MR 3 2011
Chromium MR 3 2011
CYANIDE MR 3 2011
Fluoride MR 3 2011
Mercury MR 3 2011
Selenium MR 3 2011
Antimony, Total MR 3 2011
Beryllium, Total MR 3 2011
Endrin MR 3 2011
Methoxychlor MR 3 2011
BHC-GAMMA MR 3 2011
Toxaphene MR 3 2011
Dalapon MR 3 2011
Endothall MR 3 2011
Di(2-ethylhexyl) adipate MR 3 2011

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 2 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
PFHxS 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 4/30/2025 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 4/30/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFUnA 4/30/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 4/30/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFBA 4/30/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFNA 4/30/2025 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 4/30/2025 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 4/30/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 4/30/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 4/30/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFBS 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
lithium 4/30/2025 34.1000 µg/L 9 µg/L Detected
PFOS 4/30/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFMBA 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 4/30/2025 <0.004 µg/L 0.004 µg/L Not Detected
11Cl-PF3OUdS 4/30/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFEESA 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 4/30/2025 <0.005 µg/L 0.005 µg/L Not Detected
8:2 FTS 4/30/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 4/30/2025 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 4/30/2025 <0.02 µg/L 0.02 µg/L Not Detected
NMeFOSAA 4/15/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFTA 4/15/2025 <0.008 µg/L 0.008 µg/L Not Detected
NEtFOSAA 4/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 4/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 4/15/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFDoA 4/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 4/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 4/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 4/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 4/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 4/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 4/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 4/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 4/15/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 4/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
11Cl-PF3OUdS 4/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 4/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 4/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 4/15/2025 <0.002 µg/L 0.002 µg/L Not Detected
9Cl-PF3ONS 4/15/2025 <0.002 µg/L 0.002 µg/L Not Detected

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 Polacca.

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 090400106 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
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / 090400106 / 5200
2023 Arsenic MCL 117 SDWIS / 090400106 / 1005
2023 Chlorine MR 8 SDWIS / 090400106 / 0999
2023 E. COLI MR 6 SDWIS / 090400106 / 3014
2023 Revised Total Coliform Rule MON 1 SDWIS / 090400106 / 8000
2023 Revised Total Coliform Rule TT 1 SDWIS / 090400106 / 8000
2023 Revised Total Coliform Rule RPT 1 SDWIS / 090400106 / 8000
2022 Arsenic MR 29 SDWIS / 090400106 / 1005
2022 Public Notice Other 15 SDWIS / 090400106 / 7500
2022 Nitrate MR 12 SDWIS / 090400106 / 1040
2020 Glyphosate MR 4 SDWIS / 090400106 / 2034
2020 Picloram MR 4 SDWIS / 090400106 / 2040
2020 2,4-D MR 4 SDWIS / 090400106 / 2105
2020 Benzo(a)pyrene MR 4 SDWIS / 090400106 / 2306
2015 Coliform (TCR) MR 26 SDWIS / 090400106 / 3100

How Polacca Compares

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

Metric Polacca 09 avg Federal benchmark
Total violations 473 149.5 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 126 10.4 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 73.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 4,108 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 Polacca water safe to drink? ▼
Polacca (PWS ID: 090400106) has 473 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 4,108 people using Groundwater sources.
How many people does Polacca serve? ▼
Polacca serves 4,108 people in Polacca, 09. It is a Native American-owned system using Groundwater water sources with 450 service connections.
What type of violations does Polacca have? ▼
Polacca has 473 total violations: 126 health-based violations (MCL exceedances or treatment failures), 283 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Polacca water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in Polacca's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Polacca use? ▼
Polacca 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.

Explore PlainWater

Water in 09

All systems in state
All States

Water quality by state
Contaminants

PFAS & other pollutants
Guides

Understanding water quality

Related Data for 09

Environmental Data → Natural Hazards → Air Quality → Healthcare Access → Climate Data →
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

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

Related

Browse all → | Rankings →
Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial