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Community Water System · PWS WA5331477

Great Basin Water Burbank

Pasco, Washington 99301 - drinking water served from groundwater sources to 656 people, tracked in EPA SDWIS and UCMR5.

656
People served
762
EPA violations
74
Health-based
Untested
UCMR5 result

The verdict

EPA records 762 drinking-water violations at Great Basin Water Burbank, 10% of them health-based - above the Washington per-system average.

762
Total EPA violations on record
10%
Health-based (MCL / treatment failure)
656
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Great Basin Water Burbank

Great Basin Water Burbank is a private-owned community water system that delivers drinking water to 656 residents in Pasco, Washington (Walla Walla County) through 212 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 762 total violations for this system , of which 74 (10%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 675 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 Nitrate, recorded in 61 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 Washington, EPA tracks 4,557 public water systems serving 9,736,844 people, with 314,648 cumulative violations and 20,590 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 69 violations. Statewide, 98 of 247 UCMR5-tested systems have reported PFAS detections (39.7%).

Great Basin Water Burbank's 762 violations sit above the Washington average.

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
656
Total Violations
762
Health-Based Violations
74
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
212
County
Walla Walla
School/Daycare
No
MCL Violations
74
Monitoring Violations
675
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MCL 61 2022
cis-1,2-Dichloroethylene MR 27 2023
DICHLOROMETHANE MR 27 2023
o-Dichlorobenzene MR 27 2023
Vinyl chloride MR 27 2023
1,1,1-Trichloroethane MR 27 2023
1,2-Dichloropropane MR 27 2023
Tetrachloroethylene MR 27 2023
CHLOROBENZENE MR 27 2023
Benzene MR 27 2023
Ethylbenzene MR 27 2023
Styrene MR 27 2023
1,2,4-Trichlorobenzene MR 27 2023
p-Dichlorobenzene MR 27 2023
trans-1,2-Dichloroethylene MR 27 2023
1,2-Dichloroethane MR 27 2023
Carbon tetrachloride MR 27 2023
Trichloroethylene MR 27 2023
1,1,2-Trichloroethane MR 27 2023
Toluene MR 27 2023
1,1-Dichloroethylene MR 27 2023
Fluoride MR 26 2023
Lead and Copper Rule MR 24 2019
Coliform (TCR) MR 15 1999
Coliform (TCR) MCL 8 2006
Nitrate MR 7 2005
Diquat MR 7 2007
Consumer Confidence Rule Other 6 2015
Fluoride MCL 5 2024
Dinoseb MR 3 2020

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 Great Basin Water Burbank.

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 WA5331477 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Washington Drinking Water Authority

Washington State Department of Health, Office of Drinking Water is the primacy agency that licenses and inspects Great Basin Water Burbank under EPA-delegated authority.

Open WA regulator portal

Source: Washington State Department of Health, Office of Drinking Water

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 Fluoride MCL 5 SDWIS / WA5331477 / 1025
2023 cis-1,2-Dichloroethylene MR 27 SDWIS / WA5331477 / 2380
2023 DICHLOROMETHANE MR 27 SDWIS / WA5331477 / 2964
2023 o-Dichlorobenzene MR 27 SDWIS / WA5331477 / 2968
2023 Vinyl chloride MR 27 SDWIS / WA5331477 / 2976
2023 1,1,1-Trichloroethane MR 27 SDWIS / WA5331477 / 2981
2023 1,2-Dichloropropane MR 27 SDWIS / WA5331477 / 2983
2023 Tetrachloroethylene MR 27 SDWIS / WA5331477 / 2987
2023 CHLOROBENZENE MR 27 SDWIS / WA5331477 / 2989
2023 Benzene MR 27 SDWIS / WA5331477 / 2990
2023 Ethylbenzene MR 27 SDWIS / WA5331477 / 2992
2023 Styrene MR 27 SDWIS / WA5331477 / 2996
2023 1,2,4-Trichlorobenzene MR 27 SDWIS / WA5331477 / 2378
2023 p-Dichlorobenzene MR 27 SDWIS / WA5331477 / 2969
2023 trans-1,2-Dichloroethylene MR 27 SDWIS / WA5331477 / 2979

How Great Basin Water Burbank Compares

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

Metric Great Basin Water Burbank Washington avg Federal benchmark
Total violations 762 69 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 74 4.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 39.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 656 2,137 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 4,557 regulated public water systems in Washington.

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 Great Basin Water Burbank water safe to drink? ▼
Great Basin Water Burbank (PWS ID: WA5331477) has 762 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 656 people using Groundwater sources.
How many people does Great Basin Water Burbank serve? ▼
Great Basin Water Burbank serves 656 people in Pasco, Washington. It is a Private-owned system using Groundwater water sources with 212 service connections.
What type of violations does Great Basin Water Burbank have? ▼
Great Basin Water Burbank has 762 total violations: 74 health-based violations (MCL exceedances or treatment failures), 675 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Great Basin Water Burbank water? ▼
No PFAS testing data is available for Great Basin Water Burbank under the EPA's UCMR5 monitoring program.
What water source does Great Basin Water Burbank use? ▼
Great Basin Water Burbank 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.
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.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

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.