Question 1

Is Lewis Co Water Dist #2 water safe to drink?

Accepted Answer

Lewis Co Water Dist #2 (PWS ID: WA5347001) has 2344 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 1,983 people using Groundwater sources.

Question 2

How many people does Lewis Co Water Dist #2 serve?

Accepted Answer

EPA SDWIS reports that Lewis Co Water Dist #2 serves 1,983 people (this public water system's service population, not the municipal population of Onalaska or any other city). It is a Local-owned system using Groundwater water sources with 246 service connections. The operator address is listed in Onalaska, Washington.

Question 3

What type of violations does Lewis Co Water Dist #2 have?

Accepted Answer

Lewis Co Water Dist #2 has 2,344 total violations: 2 health-based violations (MCL exceedances or treatment failures), 2,335 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Lewis Co Water Dist #2 water?

Accepted Answer

No PFAS testing data is available for Lewis Co Water Dist #2 under the EPA's UCMR5 monitoring program.

Question 5

What water source does Lewis Co Water Dist #2 use?

Accepted Answer

Lewis Co Water Dist #2 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

Where does Lewis Co Water Dist #2 sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Lewis Co Water Dist #2 ranks #13,740 of 29,740 by people served, and #361 of 766 in Washington. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Lewis Co Water Dist #2's violation count compare nationally?

Accepted Answer

Lewis Co Water Dist #2 has 2,344 recorded EPA SDWIS violations, fewer than 0% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 100% of that cohort has fewer violations than Lewis Co Water Dist #2. 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
Endrin	MR	126	2008
BHC-GAMMA	MR	126	2008
Methoxychlor	MR	126	2008
Toxaphene	MR	126	2008
Di(2-ethylhexyl) adipate	MR	126	2008
Simazine	MR	126	2008
Atrazine	MR	126	2008
Heptachlor	MR	126	2008
Heptachlor epoxide	MR	126	2008
HEXACHLOROBENZENE	MR	126	2008
Chlordane	MR	126	2008
Hexachlorocyclopentadiene	MR	126	2008
LASSO	MR	126	2008
Benzo(a)pyrene	MR	126	2008
Di(2-ethylhexyl) phthalate	MR	94	2008
Pentachlorophenol	MR	35	2008
Nitrate	MR	28	2015
Lead and Copper Rule	MR	21	2008
Coliform (TCR)	MR	12	2010
Picloram	MR	11	2005
Dinoseb	MR	11	2005
2,4,5-TP	MR	11	2005
Dalapon	MR	11	2005
cis-1,2-Dichloroethylene	MR	10	2005
DICHLOROMETHANE	MR	10	2005
p-Dichlorobenzene	MR	10	2005
Vinyl chloride	MR	10	2005
1,2-Dichloroethane	MR	10	2005
1,1,1-Trichloroethane	MR	10	2005
Carbon tetrachloride	MR	10	2005

Lewis Co Water Dist #2

Lewis Co Water Dist #2 standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Health-based violations on Lewis Co Water Dist #2

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems near this population served