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Tap water quality report

Ryderwood Improvement & Service As

EPA monitoring tested this supplier for 61 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

61
contaminants tested
9
detected
434
people served
11
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Surface water
Ownership
Local government
Counties served
Cowlitz

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

11
health-based violations
88
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Archived 2008-03-01 → 2008-03-31
TT Health-based Archived 2007-12-01 → 2007-12-31
TT Health-based Archived 1994-09-01 → 1994-09-30
TT Health-based Archived 1994-08-01 → 1994-08-31
TT Health-based Archived 1994-07-01 → 1994-07-31
TT Health-based Archived 1994-06-01 → 1994-06-30
TT Health-based Archived 1994-05-01 → 1994-05-31
TT Health-based Archived 1994-04-01 → 1994-04-30
TT Health-based Archived 1994-03-01 → 1994-03-31
TT Health-based Archived 1994-02-01 → 1994-02-28

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Lead
0.00050 mg/L 3.3%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2024
Nitrate
600 µg/L 6%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Chloroform
43.55 µg/L
No EPA limit set
worst single sample: 54 µg/L
12/12 SYR4 2012–2019
TTHM
46.59 µg/L 58%
of the EPA limit 80 µg/L
worst single sample: 57.7 µg/L
12/12 SYR4 2012–2019
Bromodichloromethane
3.1 µg/L
No EPA limit set
worst single sample: 3.7 µg/L
11/12 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
25.7 µg/L 43%
of the EPA limit 60 µg/L
worst single sample: 26 µg/L
7/8 SYR4 2012–2019
Trichloroacetic Acid
21.1 µg/L
No EPA limit set
worst single sample: 22 µg/L
7/8 SYR4 2012–2019
Dichloroacetic Acid
11.75 µg/L
No EPA limit set
worst single sample: 12 µg/L
6/8 SYR4 2012–2019
Nitrate-Nitrite
438 µg/L 4.4%
of the EPA limit 10000 µg/L
 1/1 SYR4 2017
52 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBromoformChlorobenzeneCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitritePentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Susan Eugenis

Frequently asked questions about Ryderwood Improvement & Service As

Is Ryderwood Improvement & Service As tap water safe to drink?

EPA monitoring detected 9 contaminants in Ryderwood Improvement & Service As's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Ryderwood Improvement & Service As's water?

EPA monitoring detected Lead, Nitrate, Chloroform, TTHM, Bromodichloromethane, and others. The full list with the level and data source for each is above.

How many people does Ryderwood Improvement & Service As serve?

Ryderwood Improvement & Service As reports serving 434 people in Washington, per its EPA record.

Has Ryderwood Improvement & Service As had any water quality violations?

The EPA has 88 violations on file for Ryderwood Improvement & Service As, of which 11 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.