HILO

Hawaii — Community Water System — PWSID: HI0000101

System Information

PWSID	HI0000101
System Name	HILO
System Type	Community Water System
Water Source	Ground Water
Activity Status	Active
Owner Type	Local
EPA Region	09
Serves School	No
Wholesaler	No
First Reported	Sep 10, 1979
Last Reported	Mar 17, 2026

Location & Contact

State	Hawaii
City	HILO
ZIP Code	96720
Address	DEPARTMENT OF WATER SUPPLY
Organization	OKAMOTO, KEITH K.
Phone	808-961-8050

Population & Service

Population Served	39,477
Service Connections	14,621

Drinking Water Violations (170)

This water system has 170 violations recorded in the EPA SDWIS database.

Begin Date	End Date	Category	Health-Based	Major	Measured	Federal MCL	State MCL	Status	Return to Compliance	Rule
Jan 1, 2009	Jan 31, 2009	TT	Yes	No	—	—	—	Resolved	Jan 31, 2009	—
Jan 1, 2009	Jan 31, 2009	TT	Yes	No	—	—	—	Resolved	Jan 31, 2009	—
Jan 1, 2009	Jan 31, 2009	TT	Yes	No	—	—	—	Resolved	Jan 31, 2009	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Jan 1, 2000	—	TT	Yes	No	—	—	—	Resolved	Oct 31, 2002	—
Dec 1, 1999	Dec 31, 1999	TT	Yes	No	—	—	—	Archived	Dec 31, 1999	—
Dec 1, 1999	Dec 31, 1999	TT	Yes	No	—	—	—	Archived	Dec 31, 1999	—
Dec 1, 1999	Dec 31, 1999	TT	Yes	No	—	—	—	Archived	Dec 31, 1999	—
Nov 1, 1999	Nov 30, 1999	TT	Yes	No	—	—	—	Archived	Nov 30, 1999	—
Nov 1, 1999	Nov 30, 1999	TT	Yes	No	—	—	—	Archived	Nov 30, 1999	—
Nov 1, 1999	Nov 30, 1999	TT	Yes	No	—	—	—	Archived	Nov 30, 1999	—
Oct 1, 1999	Oct 31, 1999	TT	Yes	No	—	—	—	Archived	Oct 31, 1999	—
Oct 1, 1999	Oct 31, 1999	TT	Yes	No	—	—	—	Archived	Oct 31, 1999	—
Oct 1, 1999	Oct 31, 1999	TT	Yes	No	—	—	—	Archived	Oct 31, 1999	—
Sep 1, 1999	Sep 30, 1999	TT	Yes	No	—	—	—	Archived	Sep 30, 1999	—
Sep 1, 1999	Sep 30, 1999	TT	Yes	No	—	—	—	Archived	Sep 30, 1999	—
Sep 1, 1999	Sep 30, 1999	TT	Yes	No	—	—	—	Archived	Sep 30, 1999	—
Aug 1, 1999	Aug 31, 1999	TT	Yes	No	—	—	—	Archived	Aug 31, 1999	—
Aug 1, 1999	Aug 31, 1999	TT	Yes	No	—	—	—	Archived	Aug 31, 1999	—

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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