Pesticides in Arizona Well Water

EPA Data 2025 · Risk Level: Low

Avg Level

0.566 ppb

EPA Limit

3 ppb

% Above Limit

3.4%

Risk Level

low

Live DataLast updated: April 4, 2026·Source: EPA SDWIS & USGS

Water Quality Details

Contaminant	Pesticides
Category	chemical
Average Level	0.566 ppb
Maximum Level	2.062 ppb
EPA Limit (MCL)	3 ppb
% Wells Above Limit	3.4%
Affected Wells	9,520
Testing Cost	$122
Treatment Cost	$283
vs National Avg	-0.827 ppb (-59.4%)

Arizona Well Water Overview

Well Users

280,000

% on Well Water

7.2%

Quality Score

72/100

Highest Risk States for Pesticides

#1Tennessee16.7% above limit #2Iowa16.3% above limit #3Louisiana15.0% above limit #4Colorado14.8% above limit #5Delaware13.0% above limit

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EPA SDWIS & USGS

📊

WellWaterPeek Research TeamData Specialists

Our team analyzes data from EPA SDWIS & USGS to deliver accurate, up-to-date information. All data is verified and cross-referenced with official sources.

✓ EPA SDWIS & USGS✓ Updated 2025

Frequently Asked Questions

Is pesticides a problem in Arizona well water?

In Arizona, pesticides levels average 0.566 ppb, with a maximum recorded level of 2.062 ppb. The EPA limit is 3 ppb. Currently 3.4% of tested wells exceed this limit, affecting approximately 9,520 wells.

How much does it cost to test for pesticides in Arizona?

Testing for pesticides in Arizona typically costs around $122. If treatment is needed, water treatment systems for pesticides cost approximately $283.

What is the risk level of pesticides in Arizona well water?

The risk level for pesticides in Arizona is rated as low. The state average of 0.566 ppb is 59.4% below the national average of 1.393 ppb.

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