Question 1

Is Zig Zag Water Co-Op water safe to drink?

Accepted Answer

Zig Zag Water Co-Op (PWS ID: OR4101241) has 147 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 60 people using Groundwater sources.

Question 2

How many people does Zig Zag Water Co-Op serve?

Accepted Answer

EPA SDWIS reports that Zig Zag Water Co-Op serves 60 people (this public water system's service population, not the municipal population of Welches or any other city). It is a Private-owned system using Groundwater water sources with 46 service connections. The operator address is listed in Welches, Oregon.

Question 3

What type of violations does Zig Zag Water Co-Op have?

Accepted Answer

Zig Zag Water Co-Op has 147 total violations: 18 health-based violations (MCL exceedances or treatment failures), 125 monitoring/reporting violations, and 6 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Zig Zag Water Co-Op water?

Accepted Answer

No PFAS testing data is available for Zig Zag Water Co-Op under the EPA's UCMR5 monitoring program.

Question 5

What water source does Zig Zag Water Co-Op use?

Accepted Answer

Zig Zag Water Co-Op uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Question 6

Where does this data come from?

Accepted Answer

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Question 7

How does Zig Zag Water Co-Op's violation count compare nationally?

Accepted Answer

Zig Zag Water Co-Op has 147 recorded EPA SDWIS violations, fewer than 19% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 81% of that cohort has fewer violations than Zig Zag Water Co-Op. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

Contaminant	Category	Count	Latest
Coliform (TCR)	MR	19	2014
Coliform (TCR)	MCL	12	2003
Nitrate	MR	10	2021
Combined Uranium	MR	9	2014
Combined Radium (-226 and -228)	MR	8	2014
Lead and Copper Rule	TT	6	2000
TTHM	MR	5	2022
Total Haloacetic Acids (HAA5)	MR	5	2022
Lead and Copper Rule	MR	4	2013
COLIPHAGE	MR	3	2013
Endrin	MR	2	1996
HEXACHLOROBENZENE	MR	2	1996
Methoxychlor	MR	2	1996
Total Polychlorinated Biphenyls (PCB)	MR	2	1996
Toxaphene	MR	2	1996
1,1-Dichloroethylene	MR	2	1996
cis-1,2-Dichloroethylene	MR	2	1996
Ethylbenzene	MR	2	1996
CHLOROBENZENE	MR	2	1996
p-Dichlorobenzene	MR	2	1996
Styrene	MR	2	1996
trans-1,2-Dichloroethylene	MR	2	1996
Trichloroethylene	MR	2	1996
Consumer Confidence Rule	Other	2	2023
BHC-GAMMA	MR	2	1996
Vinyl chloride	MR	2	1996
DICHLOROMETHANE	MR	2	1996
Heptachlor	MR	2	1996
1,2-Dichloropropane	MR	2	1996
Tetrachloroethylene	MR	2	1996

Zig Zag Water Co-Op

Zig Zag Water Co-Op standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Population served record for Zig Zag Water Co-Op

Nationwide peers

Cross-state systems with comparable violation load