HOLLIS
PWSID: OK2002901 · Hollis, OK · Serves 2,264 people
According to EPA Safe Drinking Water Information System (SDWIS), HOLLIS (PWSID OK2002901) in Hollis, OK is listed as a CWS water system covering about 2,264 people. The same extract lists 105 health-based violation records spanning 1986-2024. Those 105 health-based rows for HOLLIS cover contaminants such as Nitrate-Nitrite, Nitrate, Coliform (TCR); they remain historical EPA registry entries, not a current compliance or drinkability score.
HOLLIS has 105 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 4 distinct EPA contaminant codes appear in this system's record, including Nitrate-Nitrite, Nitrate, Coliform (TCR). Recorded violations span 1986–2024. Day-to-day primacy enforcement for this system runs through the Oklahoma drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Oklahoma state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- OK2002901
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Hollis, OK
- Population Served
- 2,264
- Health Violations
- Yes (105)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Nitrate-Nitrite | 68 | 68 |
| Nitrate | 33 | 33 |
| Coliform (TCR) | 3 | 3 |
| Coliform (Pre-TCR) | 1 | 1 |
Violation History (105)
| Contaminant | Health | Date |
|---|---|---|
| Nitrate-Nitrite | Yes | Jul 1, 2024 |
| Nitrate-Nitrite | Yes | Jul 1, 2024 |
| Nitrate-Nitrite | Yes | Jul 1, 2020 |
| Nitrate-Nitrite | Yes | Oct 1, 2018 |
| Nitrate-Nitrite | Yes | Jul 1, 2018 |
| Nitrate-Nitrite | Yes | Apr 1, 2018 |
| Nitrate-Nitrite | Yes | Jan 1, 2018 |
| Nitrate-Nitrite | Yes | Oct 1, 2017 |
| Nitrate-Nitrite | Yes | Jul 1, 2017 |
| Nitrate-Nitrite | Yes | Apr 1, 2017 |
| Nitrate-Nitrite | Yes | Jan 1, 2017 |
| Nitrate-Nitrite | Yes | Jan 1, 2017 |
| Nitrate-Nitrite | Yes | Oct 1, 2016 |
| Nitrate-Nitrite | Yes | Apr 1, 2016 |
| Nitrate-Nitrite | Yes | Jan 1, 2016 |
| Nitrate-Nitrite | Yes | Oct 1, 2015 |
| Nitrate-Nitrite | Yes | Jul 1, 2015 |
| Nitrate-Nitrite | Yes | Apr 1, 2015 |
| Nitrate-Nitrite | Yes | Oct 1, 2014 |
| Nitrate-Nitrite | Yes | Jul 1, 2014 |
| Nitrate-Nitrite | Yes | Jan 1, 2014 |
| Nitrate-Nitrite | Yes | Jul 1, 2013 |
| Nitrate-Nitrite | Yes | Apr 1, 2013 |
| Nitrate-Nitrite | Yes | Jan 1, 2013 |
| Nitrate-Nitrite | Yes | Oct 1, 2012 |
| Nitrate-Nitrite | Yes | Jul 1, 2012 |
| Nitrate-Nitrite | Yes | Jan 1, 2012 |
| Nitrate-Nitrite | Yes | Jan 1, 2012 |
| Nitrate-Nitrite | Yes | Oct 1, 2011 |
| Nitrate-Nitrite | Yes | Jul 1, 2011 |
| Nitrate-Nitrite | Yes | Apr 1, 2011 |
| Nitrate-Nitrite | Yes | Jan 1, 2011 |
| Nitrate-Nitrite | Yes | Oct 1, 2010 |
| Nitrate-Nitrite | Yes | Jul 1, 2010 |
| Nitrate-Nitrite | Yes | Apr 1, 2010 |
| Nitrate-Nitrite | Yes | Jul 1, 2009 |
| Nitrate-Nitrite | Yes | Apr 1, 2009 |
| Nitrate-Nitrite | Yes | Jan 1, 2009 |
| Nitrate-Nitrite | Yes | Oct 1, 2008 |
| Nitrate-Nitrite | Yes | Jul 1, 2008 |
| Nitrate-Nitrite | Yes | Jan 1, 2008 |
| Nitrate-Nitrite | Yes | Oct 1, 2007 |
| Nitrate-Nitrite | Yes | Jul 1, 2007 |
| Nitrate-Nitrite | Yes | Apr 1, 2007 |
| Nitrate-Nitrite | Yes | Jan 1, 2007 |
| Nitrate-Nitrite | Yes | Oct 1, 2006 |
| Nitrate-Nitrite | Yes | Jul 1, 2006 |
| Nitrate-Nitrite | Yes | Apr 1, 2006 |
| Nitrate-Nitrite | Yes | Apr 1, 2006 |
| Nitrate-Nitrite | Yes | Jan 1, 2006 |
| Nitrate-Nitrite | Yes | Jan 1, 2006 |
| Nitrate-Nitrite | Yes | Oct 1, 2005 |
| Nitrate-Nitrite | Yes | Oct 1, 2005 |
| Nitrate-Nitrite | Yes | Jul 1, 2005 |
| Nitrate-Nitrite | Yes | Jul 1, 2005 |
| Nitrate-Nitrite | Yes | Apr 1, 2005 |
| Nitrate-Nitrite | Yes | Jan 1, 2005 |
| Nitrate-Nitrite | Yes | Oct 1, 2004 |
| Nitrate-Nitrite | Yes | Jul 1, 2004 |
| Nitrate-Nitrite | Yes | Apr 1, 2004 |
| Nitrate-Nitrite | Yes | Apr 1, 2004 |
| Nitrate-Nitrite | Yes | Jan 1, 2004 |
| Nitrate-Nitrite | Yes | Jan 1, 2004 |
| Nitrate-Nitrite | Yes | Oct 1, 2003 |
| Nitrate-Nitrite | Yes | Jul 1, 2003 |
| Nitrate-Nitrite | Yes | Jul 1, 2003 |
| Nitrate | Yes | Apr 1, 2003 |
| Nitrate-Nitrite | Yes | Jan 1, 2003 |
| Nitrate-Nitrite | Yes | Jan 1, 2003 |
| Nitrate | Yes | Oct 1, 2002 |
| Nitrate | Yes | Jul 1, 2002 |
| Nitrate | Yes | Jan 1, 2002 |
| Nitrate | Yes | Oct 1, 2001 |
| Nitrate | Yes | Jul 1, 2001 |
| Nitrate | Yes | Jan 1, 2001 |
| Nitrate | Yes | Oct 1, 2000 |
| Nitrate | Yes | Jul 1, 2000 |
| Nitrate | Yes | Oct 1, 1999 |
| Nitrate | Yes | Jan 1, 1999 |
| Nitrate | Yes | Oct 1, 1998 |
| Nitrate | Yes | Jul 1, 1998 |
| Coliform (TCR) | Yes | May 1, 1998 |
| Nitrate | Yes | Apr 1, 1998 |
| Nitrate | Yes | Jan 1, 1998 |
| Nitrate | Yes | Oct 1, 1997 |
| Nitrate | Yes | Jul 1, 1997 |
| Nitrate | Yes | Apr 1, 1997 |
| Nitrate | Yes | Jan 1, 1997 |
| Nitrate | Yes | Oct 1, 1996 |
| Nitrate | Yes | Jul 1, 1996 |
| Nitrate | Yes | Jun 30, 1996 |
| Nitrate | Yes | Apr 1, 1996 |
| Nitrate | Yes | Jan 1, 1996 |
| Nitrate | Yes | Oct 1, 1995 |
| Nitrate | Yes | Apr 1, 1995 |
| Nitrate | Yes | Jan 1, 1995 |
| Nitrate | Yes | Oct 1, 1994 |
| Nitrate | Yes | Jul 1, 1994 |
| Nitrate | Yes | Apr 1, 1994 |
| Nitrate | Yes | Jan 1, 1994 |
Frequently Asked Questions
What does EPA SDWIS list for HOLLIS?
How many people does HOLLIS serve?
What violations does HOLLIS have?
What contaminants have been found in HOLLIS water?
Compare beyond Oklahoma
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest HOLLIS on cumulative violation count (105) and EPA-reported population served (2,264). Violation-count peers include TANNEHILL WATER SYSTEM, Dilkon-Indian Wells-Greasewood-White Cone NTUA, WALLA WALLA WATER DIVISION. Population peers include CITY OF ITALY, EAST LOGAN CO RURAL WATER, RIPLEY COUNTY PWSD 1 EAST.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Similar population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ gate).
Nearby Water Systems
Explore More
About This Data
HOLLIS (OK2002901) is drawn from EPA SDWIS. Nearby county systems in this extract include HARMON WATER CORP; GOULD PWA; HARMON ELECTRIC; THIRSTY WATER CORP. Health-based rows (105 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.