Water Quality in Dillingham, AK (99576)

EPA violation data for public water systems serving ZIP code 99576.

Based on EPA compliance data. Not a substitute for an official water quality report from your utility.

2,454

Population

26

Water Systems

364

Violations (5yr)

8

Health-Based

Location

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Water Systems Serving This Area (26)

Dillingham Water System

1 health-based
Groundwater 2,419 people served
164 violations (5yr) · 1 health-based · All resolved
Lead tested: 0.4 ppb (limit: 15 ppb) ✓

Holy Rosary Rectory & Church

Groundwater 531 people served
0 violations

Bbahc - Kanakanak Hospital

Groundwater 305 people served
0 violations
Lead tested: 11 ppb (limit: 15 ppb) ✓

Swsd Togiak K12 School

All resolved
Groundwater 280 people served
6 violations (5yr) · All resolved

Dillingham Courthouse

All resolved
Groundwater 219 people served
1 violation (5yr) · All resolved

Swsd Manokotak Heights School

All resolved
Groundwater 177 people served
2 violations (5yr) · All resolved
Lead tested: 2.3 ppb (limit: 15 ppb) ✓

Koliganek Water System

All resolved
Groundwater 170 people served
5 violations (5yr) · All resolved
Lead tested: 5.8 ppb (limit: 15 ppb) ✓ Copper tested: 2100 ppb (limit: 1300 ppb)

Ekuk Fisheries

3 health-based
Groundwater 150 people served
5 violations (5yr) · 3 health-based

Bristol Bay Native Assoc.

All resolved
Groundwater 120 people served
3 violations (5yr) · All resolved
Lead tested: 1.2 ppb (limit: 15 ppb) ✓ Copper tested: 1500 ppb (limit: 1300 ppb)

Sea Inn

Groundwater 100 people served
0 violations

Twin Hills Water System

Groundwater 87 people served
106 violations (5yr)

Windmill Grille

All resolved
Groundwater 85 people served
4 violations (5yr) · All resolved

Swrsd Koliganek School

Purchased groundwater 72 people served
0 violations
Lead tested: 4.8 ppb (limit: 15 ppb) ✓

Bristol Bay Lodge

3 health-based
Groundwater 46 people served
10 violations (5yr) · 3 health-based · All resolved

Swrsd Twin Hills School

All resolved
Groundwater 38 people served
43 violations (5yr) · All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓

Swsd Aleknagik Northshore

All resolved
Groundwater 38 people served
1 violation (5yr) · All resolved
Lead tested: 3.3 ppb (limit: 15 ppb) ✓

Golden Horn Lodge

Groundwater 34 people served
0 violations

Willow Tree Bar

Groundwater 33 people served
0 violations

Crystal Creek Lodge

Groundwater under influence of surface water 32 people served
0 violations

Salmon Roe

All resolved
Groundwater 31 people served
3 violations (5yr) · All resolved
Lead tested: 2.1 ppb (limit: 15 ppb) ✓

Nina Nicholson Subdivision

1 health-based
Groundwater 31 people served
11 violations (5yr) · 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓

Frozen Grounds Ice Cream

Groundwater 30 people served
0 violations

Gauthier Ii S/D

Groundwater 25 people served
0 violations

Swsd Wm Nelson School Ekwok

Groundwater 19 people served
0 violations

Wood River Apartment

Groundwater 13 people served
0 violations

Vitavik

Groundwater 0
0 violations

Contaminants Found

Revised Total Coliform RuleHealth-Based

Missed testing deadlines — not a detection of bacteria.

35 violations
All resolved
Groundwater RuleHealth-Based
6 violations
Has active
Consumer Confidence RuleMonitoring

Annual water quality report delivery requirement.

12 violations
All resolved
Lead and Copper RuleMonitoring

Lead and copper testing requirement. Lead exposure can cause developmental harm in children.

11 violations
All resolved
LASSOMonitoring
9 violations
All resolved
NitrateMonitoring

At high levels, nitrate can cause blue baby syndrome in infants.

9 violations
All resolved
SimazineMonitoring
8 violations
All resolved
1,2-DIBROMO-3-CHLOROPROPANEMonitoring
8 violations
All resolved
2,4-DMonitoring
8 violations
All resolved
2,3,7,8-TCDDMonitoring
8 violations
All resolved
Di(2-ethylhexyl) phthalateMonitoring
8 violations
All resolved
HEXACHLOROBENZENEMonitoring
8 violations
All resolved
DiquatMonitoring
8 violations
All resolved
Di(2-ethylhexyl) adipateMonitoring
8 violations
All resolved
MethoxychlorMonitoring
8 violations
All resolved
BHC-GAMMAMonitoring
8 violations
All resolved
HeptachlorMonitoring
8 violations
All resolved
ChlordaneMonitoring
8 violations
All resolved
EndrinMonitoring
8 violations
All resolved
ToxapheneMonitoring
8 violations
All resolved
ETHYLENE DIBROMIDEMonitoring
8 violations
All resolved
OXAMYLMonitoring
8 violations
All resolved
CarbofuranMonitoring
8 violations
All resolved
EndothallMonitoring
8 violations
All resolved
Total Polychlorinated Biphenyls (PCB)Monitoring
8 violations
All resolved
Heptachlor epoxideMonitoring
8 violations
All resolved
GlyphosateMonitoring
8 violations
All resolved
DinosebMonitoring
8 violations
All resolved
AtrazineMonitoring
8 violations
All resolved
HexachlorocyclopentadieneMonitoring
8 violations
All resolved
DalaponMonitoring
8 violations
All resolved
Benzo(a)pyreneMonitoring
8 violations
All resolved
PicloramMonitoring
8 violations
All resolved
PentachlorophenolMonitoring
8 violations
All resolved
2,4,5-TPMonitoring
8 violations
All resolved
Public NoticeMonitoring
3 violations
All resolved
ChlorineMonitoring

Used to disinfect water — generally safe at regulated levels.

2 violations
All resolved
1,1-DichloroethyleneMonitoring
2 violations
All resolved
1,1,2-TrichloroethaneMonitoring
2 violations
All resolved
o-DichlorobenzeneMonitoring
2 violations
All resolved
1,1,1-TrichloroethaneMonitoring
2 violations
All resolved
TolueneMonitoring
2 violations
All resolved
1,2-DichloropropaneMonitoring
2 violations
All resolved
Xylenes, TotalMonitoring
2 violations
All resolved
TrichloroethyleneMonitoring
2 violations
All resolved
BenzeneMonitoring
2 violations
All resolved
cis-1,2-DichloroethyleneMonitoring
2 violations
All resolved
p-DichlorobenzeneMonitoring
2 violations
All resolved
DICHLOROMETHANEMonitoring
2 violations
All resolved
Vinyl chlorideMonitoring
2 violations
All resolved
EthylbenzeneMonitoring
2 violations
All resolved
Carbon tetrachlorideMonitoring
2 violations
All resolved
CHLOROBENZENEMonitoring
2 violations
All resolved
StyreneMonitoring
2 violations
All resolved
TetrachloroethyleneMonitoring
2 violations
All resolved
1,2-DichloroethaneMonitoring
2 violations
All resolved
trans-1,2-DichloroethyleneMonitoring
2 violations
All resolved
1,2,4-TrichlorobenzeneMonitoring
2 violations
All resolved

Lead & Copper Levels

Lead (Pb)

Within limit
4.8 ppb measured Action level: 15 ppb

Sampled: Jul 2025

Copper (Cu)

Exceeds limit
2100 ppb measured Action level: 1300 ppb

Sampled: Jan 2025

How Does This Compare?

Dillingham (99576) has more violations than 100% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 364.

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.

UV Water Purifier

Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.

Targets:E. coli, Coliform, Giardia, Cryptosporidium

Look for:NSF/ANSI 55 (Class A) certified

NSF Certified Products → EPA Safe Drinking Water Guide →

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.

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