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Grays Harbor County, WA Water Quality

Water quality data for 21 public water systems serving Grays Harbor County, Washington — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 21 water systems · 26 cities
✅
Generally Safe — Most Systems Performing Well

The majority of water systems have no active violations and lead levels well below the federal action level.

B

Grays Harbor County Earns a B

Grays Harbor County: 26 communities across 21 water systems. 96.2% have no open violations.

  • Median lead where detected: 2.90 ppb
  • 23 communities with a lead detection, 3 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 7 with significant inspection deficiencies
  • 96.2% of communities have no open violations
2.9 ppb
Median Lead Level
County-wide, 90th percentile
21
Water Systems
Active CWS & NTNCWS
96%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • McCleary
    2.00 ppb
    No federal limits exceeded on record
    B
  • Cosmopolis
    1.20 ppb
    No federal limits exceeded on record
    B
  • Grayland
    Not detected
    No federal limits exceeded on record
    B
  • Copalis Beach
    3.10 ppb
    No federal limits exceeded on record
    B
  • Malone
    2.80 ppb
    No federal limits exceeded on record
    B
⚠ Needs Attention
  • Taholah
    1.00 ppb
    4 violations currently open
    F
  • Hogans Corner
    7.00 ppb
    Copper above the 1,300 ppb action level
    C
  • Oyehut
    7.00 ppb
    Copper above the 1,300 ppb action level
    C
  • Qui-nai-elt Village
    0.80 ppb
    Copper above the 1,300 ppb action level
    C
  • Santiago
    9.90 ppb
    2 significant inspection deficiencies
    C
County Lead Level — Median 2.9 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2.9 ppb — 19.3% of the federal action level
Systems by Lead Level
Under 5 ppb
16
5 – 10 ppb
7
No Data
3

All Cities in Grays Harbor County

Aberdeen Not detected A
Hoquiam 1.20 ppb A
Ocean Shores Not detected B
Montesano 3.60 ppb A
Elma 1.40 ppb B
Central Park 6.40 ppb A
Westport 2.90 ppb B
McCleary 2.00 ppb B
Cosmopolis 1.20 ppb B
Grayland Not detected B
Cohassett Beach 2.90 ppb B
Oakville 6.20 ppb B
Taholah 1.00 ppb F
Copalis Beach 3.10 ppb B
Malone 2.80 ppb B
Neilton 2.50 ppb B
Pacific Beach 2.10 ppb B
Satsop 1.40 ppb B
Ocean City 7.40 ppb B
Moclips 2.10 ppb B
Qui-nai-elt Village 0.80 ppb C
Hogans Corner 7.00 ppb C
Oyehut 7.00 ppb C
Brady 3.60 ppb A
Santiago 9.90 ppb C
Ocosta 6.70 ppb B
Showing 26 cities
No active violations Active violations

About Grays Harbor County Drinking Water

Grays Harbor County is served by 21 water systems covering 26 communities. 96% have no open violations.

Of the communities reporting lead results, 23 recorded a detection, with a median of 2.90 ppb — 19% of the federal action level. 3 reported none detected, which means below the laboratory limit rather than an absence of lead.

No community here has PFAS above the federal limit on record. State inspectors recorded significant deficiencies at 7 of them.

Frequently Asked Questions

Is Grays Harbor County tap water safe to drink?▼
96% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Grays Harbor County?▼
Among communities with a detection the median is 2.90 ppb, 19% of the 15 ppb action level. 3 reported none detected and 0 reported no result.
How many water systems serve Grays Harbor County?▼
21 community water systems serve 26 communities here.
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