TapGraded
A

GILBERT RIGG WELL COOP

Chandler, AZ · 95 served

GILBERT RIGG WELL COOP serves 95 people in Chandler, AZ. It has 0 health-based violations in the last 5 years. TapGraded gives this system an A.

Score breakdown

Health-based violations (5y)

0

Monitoring violations (5y)

1

Currently unaddressed

0

Overall score

98/100

Violation history (last 5 years)

2025
Health-based Monitoring / reporting

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Lead (Lead and Copper Rule)

EPA's current lead action level is 15 ppb (dropping to 10 ppb in 2027 under the Lead and Copper Rule Improvements).

90th-percentile lead sample 0 ppb
0 ppb EPA action level: 15 ppb

PFAS (UCMR5 occurrence data)

This system was not required to sample under UCMR5 (systems serving fewer than 3,300 people are mostly exempt).

System details

System type
Community water system
Water source
Ground water
Ownership
Private
Service connections
30

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Frequently asked questions

Is Chandler, AZ tap water safe to drink?

GILBERT RIGG WELL COOP has 0 health-based violations in the last 5 years. TapGraded gives this system an A.

Does GILBERT RIGG WELL COOP have lead in its water?

The most recent 90th-percentile lead sample is 0 ppb, versus the EPA action level of 15 ppb.

Has PFAS been detected in GILBERT RIGG WELL COOP's water?

This system was not required to sample under UCMR5 (systems serving fewer than 3,300 people are mostly exempt).

Source: EPA SDWIS/ECHO · Data as of 2026Q2