F0/100

Big River Development — Water Quality Report 2026

Serving 3,550 people · Arizona

Water Source

Groundwater

County

—

System ID

090600226

Violations

225

Contaminant Test Results

2 contaminants above EPA health goals

Contaminant	Detected	Limit (MCL)	Goal (MCLG)	Status
Copper (90th percentile)	1.50 mg/L	1.30 mg/L	1.30 mg/L	Over Limit
Lead (90th percentile)	0.003 mg/L	0.015 mg/L	0 mg/L	Above Goal

EPA Violation History

Violations (last 5yr)

Unresolved

Health-Related

TIER 3Unresolved

Monitoring Violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: August 1, 2025 – August 31, 2025Rule: Total Coliform RuleVerify on EPA.gov

TIER 3Unresolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: July 1, 2025 – September 30, 2025Rule: Stage 1 DBPRVerify on EPA.gov

TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2025 – June 30, 2025Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway

TIER 3Unresolved

Disinfection byproduct treatment technique failure

When: April 1, 2025Rule: Ground Water RuleVerify on EPA.gov

TIER 3Resolved

Monitoring Violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2025 – April 30, 2025Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway

TIER 3Unresolved

Reporting Violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: November 16, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov

TIER 3Unresolved

Disinfection byproduct treatment technique failure

When: March 30, 2024Rule: Ground Water RuleVerify on EPA.gov

TIER 2Unresolved

Violation related to Consumer Confidence Report

When: March 30, 2024Rule: Consumer Confidence RuleVerify on EPA.gov

TIER 2Unresolved

Violation related to Consumer Confidence Report

When: March 30, 2024Rule: Consumer Confidence RuleVerify on EPA.gov

TIER 3Unresolved

Disinfection byproduct treatment technique failure

When: March 30, 2024Rule: Ground Water RuleVerify on EPA.gov

TIER 2Unresolved

Violation related to Consumer Confidence Report

When: March 30, 2024Rule: Consumer Confidence RuleVerify on EPA.gov

TIER 3Unresolved

Disinfection byproduct treatment technique failure

When: March 30, 2024Rule: Ground Water RuleVerify on EPA.gov

TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: October 1, 2023 – December 31, 2023Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway

TIER 3Resolved

Monitoring violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2022 – February 24, 2022Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway

TIER 3Unresolved

Failed to issue ongoing public notification

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2022Rule: Ground Water RuleVerify on EPA.gov

Understanding violation severity

Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.

Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly

Frequently Asked Questions About Big River Development

Is Big River Development water safe to drink?

Big River Development water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 225 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has Big River Development detected?

2 contaminants were tested in Big River Development's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).

Does Big River Development have any EPA violations?

Yes, Big River Development has 225 EPA violation(s) on record, with the most recent in 2025. Violation types include MON, MR, Other. 7 are health-based violations.

How many people does Big River Development serve?

Big River Development serves approximately 3,550 people, Arizona. The system provides water to 1 community: Big River.

What type of water does Big River Development provide?

Big River Development sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is 090600226.

How does Big River Development compare to other utilities in Arizona?

Big River Development scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Arizona state page for a full comparison of water systems.

Cities Served

Big River