Water Quality in Lewiston, ID (83540)

EPA violation data for public water systems serving ZIP code 83540.

No Health-Based Violations

None of the 13 water systems serving this ZIP have exceeded federal contaminant limits in the past 5 years. There are127 monitoring/reporting violations (missed testing deadlines), all resolved.

Better than 97% of US ZIP codes.

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

2,096

Population

13

Water Systems

127

Violations (5yr)

0

Health-Based

Location

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Water Systems Serving This Area (13)

Lewiston Orchards Irrigation Dist

Groundwater 20,000 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓

Lewiston City Of

Surface water 15,001 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓

Bia North Idaho

All resolved
Groundwater 490 people served
112 violations (5yr) · All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓

Lapwai City Of

All resolved
Groundwater 325 people served
5 violations (5yr) · All resolved

Zims Hot Spring

All resolved
Groundwater 300 people served
4 violations (5yr) · All resolved

South Lapwai

All resolved
Groundwater 235 people served
1 violation (5yr) · All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓

Kamiah

All resolved
Groundwater 200 people served
2 violations (5yr) · All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓

North Lapwai

Groundwater 110 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓

Nps Nez Perce National Historical Park

Groundwater 75 people served
0 violations

Schwabs Inc

All resolved
Groundwater 20 people served
3 violations (5yr) · All resolved
Lead tested: 4 ppb (limit: 15 ppb) ✓

Sweetwater/Field 19

Groundwater 10 people served
0 violations

Lenore School

Groundwater 6 people served
0 violations

Bia North Idaho Indian Agency

Groundwater 0
0 violations

Contaminants Found

Revised Total Coliform RuleMonitoring

Missed testing deadlines — not a detection of bacteria.

8 violations
All resolved
1,2-DIBROMO-3-CHLOROPROPANEMonitoring
3 violations
All resolved
ETHYLENE DIBROMIDEMonitoring
3 violations
All resolved
2,3,7,8-TCDDMonitoring
3 violations
All resolved
NitrateMonitoring

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

3 violations
All resolved
ChlorineMonitoring

Used to disinfect water — generally safe at regulated levels.

3 violations
All resolved
1,1,1-TrichloroethaneMonitoring
2 violations
All resolved
o-DichlorobenzeneMonitoring
2 violations
All resolved
DinosebMonitoring
2 violations
All resolved
HexachlorocyclopentadieneMonitoring
2 violations
All resolved
EthylbenzeneMonitoring
2 violations
All resolved
Combined UraniumMonitoring
2 violations
All resolved
MethoxychlorMonitoring
2 violations
All resolved
DiquatMonitoring
2 violations
All resolved
GlyphosateMonitoring
2 violations
All resolved
CarbofuranMonitoring
2 violations
All resolved
trans-1,2-DichloroethyleneMonitoring
2 violations
All resolved
DICHLOROMETHANEMonitoring
2 violations
All resolved
Di(2-ethylhexyl) adipateMonitoring
2 violations
All resolved
HEXACHLOROBENZENEMonitoring
2 violations
All resolved
BenzeneMonitoring
2 violations
All resolved
2,4-DMonitoring
2 violations
All resolved
cis-1,2-DichloroethyleneMonitoring
2 violations
All resolved
BHC-GAMMAMonitoring
2 violations
All resolved
LASSOMonitoring
2 violations
All resolved
Di(2-ethylhexyl) phthalateMonitoring
2 violations
All resolved
SimazineMonitoring
2 violations
All resolved
TetrachloroethyleneMonitoring
2 violations
All resolved
StyreneMonitoring
2 violations
All resolved
EndrinMonitoring
2 violations
All resolved
1,1,2-TrichloroethaneMonitoring
2 violations
All resolved
1,2-DichloroethaneMonitoring
2 violations
All resolved
HeptachlorMonitoring
2 violations
All resolved
Heptachlor epoxideMonitoring
2 violations
All resolved
OXAMYLMonitoring
2 violations
All resolved
ToxapheneMonitoring
2 violations
All resolved
EndothallMonitoring
2 violations
All resolved
TolueneMonitoring
2 violations
All resolved
Xylenes, TotalMonitoring
2 violations
All resolved
p-DichlorobenzeneMonitoring
2 violations
All resolved
1,1-DichloroethyleneMonitoring
2 violations
All resolved
Gross Alpha, Excl. Radon and UMonitoring
2 violations
All resolved
TrichloroethyleneMonitoring
2 violations
All resolved
Combined Radium (-226 and -228)Monitoring
2 violations
All resolved
CHLOROBENZENEMonitoring
2 violations
All resolved
1,2,4-TrichlorobenzeneMonitoring
2 violations
All resolved
AtrazineMonitoring
2 violations
All resolved
Carbon tetrachlorideMonitoring
2 violations
All resolved
2,4,5-TPMonitoring
2 violations
All resolved
PicloramMonitoring
2 violations
All resolved
Benzo(a)pyreneMonitoring
2 violations
All resolved
PentachlorophenolMonitoring
2 violations
All resolved
Vinyl chlorideMonitoring
2 violations
All resolved
Total Polychlorinated Biphenyls (PCB)Monitoring
2 violations
All resolved
DalaponMonitoring
2 violations
All resolved
1,2-DichloropropaneMonitoring
2 violations
All resolved
ChlordaneMonitoring
2 violations
All resolved
E. COLIMonitoring
1 violation
All resolved
Lead and Copper RuleMonitoring

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

1 violation
All resolved

Lead & Copper Levels

Lead (Pb)

Within limit
1 ppb measured Action level: 15 ppb

Sampled: Jan 2025

How Does This Compare?

Lewiston (83540) has more violations than 97% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 127, most of which are monitoring/reporting issues.

Fewer violations 97th percentile More violations

Water Filter Recommendations

No contaminant issues detected. For general protection, a basic carbon filter removes common impurities like chlorine and sediment. Look for NSF/ANSI 42 certified products.

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