TapScore USA

NOGALES CITY OF EPA Drinking Water Compliance Record

TapScore summarizes EPA Safe Drinking Water Information System records for public water system AZ0412004. It does not test household tap water or determine whether water is currently safe to drink.

C

Some recent records

TapScore compliance-history grade

17 EPA violation records from July 1, 2021 through June 30, 2026

System details

PWSID
AZ0412004
Population served
22,000
Water source
Ground Water
Owner type
Local Government
State
Arizona
EPA region
9
All historical records
611
Not marked resolved
11

How to read this grade

Grade C means “Some recent records” under TapScore's published method. It is a comparison of recent EPA compliance records, not an EPA grade, laboratory result, health recommendation, or guarantee of present water quality.

EPA contaminant categories in violation records

EPA categoryClassificationRecords
ArsenicHealth-based record42
Coliform (TCR)Health-based record24
NitrateMonitoring/reporting record18
Haloacetic Acids (HAA5)Monitoring/reporting record16
ChlordaneMonitoring/reporting record14
ChlorineMonitoring/reporting record14
AtrazineMonitoring/reporting record13
Total Trihalomethanes (TTHMs)Monitoring/reporting record13
SimazineMonitoring/reporting record13
Di(2-ethylhexyl) phthalateMonitoring/reporting record12
Consumer Confidence RuleMonitoring/reporting record12
1,2-DIBROMO-3-CHLOROPROPANEMonitoring/reporting record11
ETHYLENE DIBROMIDEMonitoring/reporting record11
MethoxychlorMonitoring/reporting record11
HeptachlorMonitoring/reporting record11
2,3,7,8-TCDDMonitoring/reporting record11
DalaponMonitoring/reporting record11
2,4-DMonitoring/reporting record11
Benzo(a)pyreneMonitoring/reporting record10
BHC-GAMMAMonitoring/reporting record10

Showing the 20 categories with the most records out of 76 categories in this system's history.

These are compliance records associated with an EPA contaminant code, not current tap-water test results or proof that a substance is presently detected.

Violation history by year

2025
4
2024
5
2023
5
2022
3
2020
1
2019
2
2017
101
2016
16
2015
20
2014
187

Historical counts may include resolved records. For current notices and local sampling results, check the utility's latest Consumer Confidence Report and your state drinking-water agency.

Reported service area

Cities served

NOGALES

ZIP codes served

85621

County: Santa Cruz