Water Quality in Coos Bay, OR (97420)
EPA violation data for public water systems serving ZIP code 97420.
Active Health Violations
14 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.
More violations than 100% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
27,621
Population
35
Water Systems
666
Violations (5yr)
14
Health-Based
Location
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Water Systems Serving This Area (35)
Coos Bay North Bend Wtr Brd
Surface water 34,500 people served
0 violations
Lead tested: 4.97 ppb (limit: 15 ppb) ✓
Eastside, City Of
Purchased surface water 1,545 people served
0 violations
Bay Park Millington
Purchased surface water 1,000 people served
0 violations
Shorewood Water Coop
Surface water 200 people served
0 violations
S H Boardman State Park
Surface water 182 people served
0 violations
Riverview Christian Fellowship
1 health-based Groundwater 164 people served
6 violations (5yr)
· 1 health-based · All resolved
Lead tested: 2.73 ppb (limit: 15 ppb) ✓ Copper tested: 1530 ppb (limit: 1300 ppb)
Coos Bay Speedway
All resolved Groundwater 150 people served
3 violations (5yr)
· All resolved
Hauser Community Church
Groundwater 144 people served
0 violations
Sumner Elementary
Surface water 121 people served
0 violations
Green Acres Elementary
Groundwater 103 people served
0 violations
Coos River Elementary
Surface water 98 people served
0 violations
Sunset Bay St Pk %V Jones
Surface water 92 people served
0 violations
Commanding Officer Navfac Ch
Purchased groundwater 85 people served
0 violations
Lower Coos River Water Corp
Surface water 80 people served
0 violations
Usn Coos Head Naval Facility
Surface water 72 people served
0 violations
Lucky Lodge % Ll Ackerman
Surface water 70 people served
0 violations
Allegany Elem % Marvin George
Surface water 58 people served
0 violations
South Slough Reserve
All resolved Groundwater 55 people served
1 violation (5yr)
· All resolved
Confusion Hill Trading Co
Groundwater 50 people served
0 violations
Hauser Bar & Grill
Groundwater 50 people served
0 violations
Sumner Water Corporation
1 health-based Surface water 50 people served
391 violations (5yr)
· 1 health-based
Lead tested: 3.6 ppb (limit: 15 ppb) ✓
Riverside Pub, The
Groundwater 50 people served
0 violations
Mt Terrace Mp % Walter Wall
Groundwater 50 people served
0 violations
Upper Chetco Elem/Headstart
Groundwater 46 people served
0 violations
Country Club Estates Wd
All resolved Surface water 45 people served
25 violations (5yr)
· All resolved
Lead tested: 1.09 ppb (limit: 15 ppb) ✓
Coos Bay Comm.Ws-%Larry Nelson
Surface water 38 people served
0 violations
Coos Golf Club
All resolved Purchased surface water 30 people served
29 violations (5yr)
· All resolved
Valley View Motel
Groundwater 30 people served
0 violations
Watsonville Water System
1 health-based Surface water 27 people served
121 violations (5yr)
· 1 health-based
Lucky Lodge Assoc.
Groundwater 26 people served
0 violations
Bob Belloni Ranch
10 health-based Surface water 25 people served
32 violations (5yr)
· 10 health-based · All resolved
Chambers Court-%M.L.Chambers
Groundwater 25 people served
0 violations
Halfway Tavern
Groundwater 20 people served
0 violations
Watsonville Wtr. Assoc.
Groundwater 20 people served
0 violations
Upper Coos River Wtr Assoc
1 health-based Surface water 20 people served
58 violations (5yr)
· 1 health-based · All resolved
Contaminants Found
Surface Water Treatment RuleHealth-Based
45 violations
Has active
LEAD AND COPPER RULE REVISIONSHealth-Based
1 violation
All resolved
Revised Total Coliform RuleMonitoring
Missed testing deadlines — not a detection of bacteria.
164 violations
All resolved
Interim Enhanced Surface Water Treatment RuleMonitoring
31 violations
All resolved
Groundwater RuleMonitoring
13 violations
All resolved
NitrateMonitoring
At high levels, nitrate can cause blue baby syndrome in infants.
10 violations
All resolved
Combined Radium (-226 and -228)Monitoring
8 violations
All resolved
Gross Alpha, Excl. Radon and UMonitoring
8 violations
All resolved
Combined UraniumMonitoring
8 violations
All resolved
1,1,1-TrichloroethaneMonitoring
7 violations
All resolved
cis-1,2-DichloroethyleneMonitoring
7 violations
All resolved
Carbon tetrachlorideMonitoring
7 violations
All resolved
1,1-DichloroethyleneMonitoring
7 violations
All resolved
trans-1,2-DichloroethyleneMonitoring
7 violations
All resolved
o-DichlorobenzeneMonitoring
7 violations
All resolved
DICHLOROMETHANEMonitoring
7 violations
All resolved
1,1,2-TrichloroethaneMonitoring
7 violations
All resolved
p-DichlorobenzeneMonitoring
7 violations
All resolved
Xylenes, TotalMonitoring
7 violations
All resolved
Vinyl chlorideMonitoring
7 violations
All resolved
CHLOROBENZENEMonitoring
7 violations
All resolved
1,2-DichloroethaneMonitoring
7 violations
All resolved
EthylbenzeneMonitoring
7 violations
All resolved
StyreneMonitoring
7 violations
All resolved
TetrachloroethyleneMonitoring
7 violations
All resolved
1,2-DichloropropaneMonitoring
7 violations
All resolved
TrichloroethyleneMonitoring
7 violations
All resolved
1,2,4-TrichlorobenzeneMonitoring
7 violations
All resolved
TolueneMonitoring
7 violations
All resolved
BenzeneMonitoring
7 violations
All resolved
2,4,5-TPMonitoring
6 violations
All resolved
EndothallMonitoring
6 violations
All resolved
BHC-GAMMAMonitoring
6 violations
All resolved
EndrinMonitoring
6 violations
All resolved
GlyphosateMonitoring
6 violations
All resolved
OXAMYLMonitoring
6 violations
All resolved
PentachlorophenolMonitoring
6 violations
All resolved
CarbofuranMonitoring
6 violations
All resolved
Total Polychlorinated Biphenyls (PCB)Monitoring
6 violations
All resolved
2,4-DMonitoring
6 violations
All resolved
LASSOMonitoring
6 violations
All resolved
HexachlorocyclopentadieneMonitoring
6 violations
All resolved
ChlordaneMonitoring
6 violations
All resolved
Di(2-ethylhexyl) adipateMonitoring
6 violations
All resolved
HEXACHLOROBENZENEMonitoring
6 violations
All resolved
1,2-DIBROMO-3-CHLOROPROPANEMonitoring
6 violations
All resolved
AtrazineMonitoring
6 violations
All resolved
MethoxychlorMonitoring
6 violations
All resolved
HeptachlorMonitoring
6 violations
All resolved
Heptachlor epoxideMonitoring
6 violations
All resolved
Di(2-ethylhexyl) phthalateMonitoring
6 violations
All resolved
DinosebMonitoring
6 violations
All resolved
ETHYLENE DIBROMIDEMonitoring
6 violations
All resolved
SimazineMonitoring
6 violations
All resolved
DalaponMonitoring
6 violations
All resolved
DiquatMonitoring
6 violations
All resolved
ToxapheneMonitoring
6 violations
All resolved
Benzo(a)pyreneMonitoring
6 violations
All resolved
PicloramMonitoring
6 violations
All resolved
Lead and Copper RuleMonitoring
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
4 violations
Has active
Public NoticeMonitoring
4 violations
Has active
COLIPHAGEMonitoring
1 violation
All resolved
Consumer Confidence RuleMonitoring
Annual water quality report delivery requirement.
1 violation
All resolved
TTHMMonitoring
1 violation
All resolved
Total Haloacetic Acids (HAA5)Monitoring
1 violation
All resolved
Lead & Copper Levels
Lead (Pb)
Within limit2.73 ppb measured
Action level: 15 ppb
Sampled: Jul 2025
Copper (Cu)
Exceeds limit1530 ppb measured
Action level: 1300 ppb
Sampled: Jan 2025
How Does This Compare?
Coos Bay (97420) has more violations than 100% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 666.
Fewer violations 100th percentile More violations
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.