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City water profile

Water hardness in Deer Park

Find official utility reports, understand hardness, and check the water system serving your home in Deer Park, Washington.

Utility-reported hardness

Not yet available

Check your provider and source →
State comparison
Unavailable
Evidence comparison rank
—
Matched utilities
1
Active health records
0

Your tap water

What does the utility report?

Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.

Utility hardness unavailable in this index

Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.

Find an official utility report →
Convert a hardness result →Test your tap →

Match the name on your water bill

Your utility’s measurements and compliance records

These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.

EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.

Deer Park City Of

WA5318500 · Groundwater · 5,435 people served system-wide

A municipal system, in-state city, and served county all agree with this Census ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →
Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level
Reported level
0.0016 mg/L
Action level
0.015 mg/L

11% of the listed benchmark

Monitoring period: Jan 1, 2023 to Dec 31, 2025

Violation history (41)
Imported violation history for Deer Park City Of
RuleStatusPeriod
EndrinResolvedOct 1, 2025 to Dec 31, 2025
MethoxychlorResolvedOct 1, 2025 to Dec 31, 2025
ToxapheneResolvedOct 1, 2025 to Dec 31, 2025
Di(2-ethylhexyl) phthalateResolvedOct 1, 2025 to Dec 31, 2025
HexachlorocyclopentadieneResolvedOct 1, 2025 to Dec 31, 2025
HeptachlorResolvedOct 1, 2025 to Dec 31, 2025
Heptachlor epoxideResolvedOct 1, 2025 to Dec 31, 2025
HEXACHLOROBENZENEResolvedOct 1, 2025 to Dec 31, 2025
Benzo(a)pyreneResolvedOct 1, 2025 to Dec 31, 2025
o-DichlorobenzeneResolvedOct 1, 2025 to Dec 31, 2025
p-DichlorobenzeneResolvedOct 1, 2025 to Dec 31, 2025
1,1-DichloroethyleneResolvedOct 1, 2025 to Dec 31, 2025
Carbon tetrachlorideResolvedOct 1, 2025 to Dec 31, 2025
1,1,2-TrichloroethaneResolvedOct 1, 2025 to Dec 31, 2025
TolueneResolvedOct 1, 2025 to Dec 31, 2025
EthylbenzeneResolvedOct 1, 2025 to Dec 31, 2025
StyreneResolvedOct 1, 2025 to Dec 31, 2025
PicloramResolvedOct 1, 2025 to Dec 31, 2025
DinosebResolvedOct 1, 2025 to Dec 31, 2025
2,4,5-TPResolvedOct 1, 2025 to Dec 31, 2025
trans-1,2-DichloroethyleneResolvedOct 1, 2025 to Dec 31, 2025
TrichloroethyleneResolvedOct 1, 2025 to Dec 31, 2025
SimazineResolvedOct 1, 2025 to Dec 31, 2025
PentachlorophenolResolvedOct 1, 2025 to Dec 31, 2025
1,1,1-TrichloroethaneResolvedOct 1, 2025 to Dec 31, 2025
ChlordaneResolvedOct 1, 2025 to Dec 31, 2025
1,2-DichloroethaneResolvedOct 1, 2025 to Dec 31, 2025
1,2,4-TrichlorobenzeneResolvedOct 1, 2025 to Dec 31, 2025
TetrachloroethyleneResolvedOct 1, 2025 to Dec 31, 2025
DICHLOROMETHANEResolvedOct 1, 2025 to Dec 31, 2025
Vinyl chlorideResolvedOct 1, 2025 to Dec 31, 2025
BHC-GAMMAResolvedOct 1, 2025 to Dec 31, 2025
BenzeneResolvedOct 1, 2025 to Dec 31, 2025
1,2-DichloropropaneResolvedOct 1, 2025 to Dec 31, 2025
AtrazineResolvedOct 1, 2025 to Dec 31, 2025
CHLOROBENZENEResolvedOct 1, 2025 to Dec 31, 2025
LASSOResolvedOct 1, 2025 to Dec 31, 2025
Di(2-ethylhexyl) adipateResolvedOct 1, 2025 to Dec 31, 2025
cis-1,2-DichloroethyleneResolvedOct 1, 2025 to Dec 31, 2025
DalaponResolvedOct 1, 2025 to Dec 31, 2025
NitrateResolvedJan 1, 2024 to Dec 31, 2024

City summary

What the indexed records say

Deer Park has 1 published ZIP profile across Spokane County. The regional-evidence median is 181 PPM. The city does not meet the stricter comparison standard.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard1 ZIP

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
20.6 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Jul 26, 2016 to Jul 26, 2016.

ZIP directory

Water reports in Deer Park

Open a ZIP for site-level provenance and measurements.

ZIP code

99006

Very Hard

181 PPM

Nearest site
20.6 mi
Confidence
Low

View full ZIP evidence →

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Deer Park

Is the water hard?

Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.