Question 1

Is Redwood Terrace Mutual water safe to drink?

Accepted Answer

Redwood Terrace Mutual (PWS ID: CA4100510) has 137 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 56 people using Surface Water sources.

Question 2

How many people does Redwood Terrace Mutual serve?

Accepted Answer

EPA SDWIS reports that Redwood Terrace Mutual serves 56 people (this public water system's service population, not the municipal population of La Honda or any other city). It is a Private-owned system using Surface Water water sources with 18 service connections. The operator address is listed in La Honda, California.

Question 3

What type of violations does Redwood Terrace Mutual have?

Accepted Answer

Redwood Terrace Mutual has 137 total violations: 5 health-based violations (MCL exceedances or treatment failures), 126 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Redwood Terrace Mutual water?

Accepted Answer

No PFAS testing data is available for Redwood Terrace Mutual under the EPA's UCMR5 monitoring program.

Question 5

What water source does Redwood Terrace Mutual use?

Accepted Answer

Redwood Terrace Mutual uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Question 6

Where does this data come from?

Accepted Answer

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Question 7

How does Redwood Terrace Mutual's violation count compare nationally?

Accepted Answer

Redwood Terrace Mutual has 137 recorded EPA SDWIS violations, fewer than 20% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 79% of that cohort has fewer violations than Redwood Terrace Mutual. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

Contaminant	Category	Count	Latest
Coliform (TCR)	MR	10	2010
Radium-228	MR	4	2009
1,2-Dichloroethane	MR	2	2009
Vinyl chloride	MR	2	2009
Trichloroethylene	MR	2	2009
Xylenes, Total	MR	2	2009
TTHM	MR	2	2009
Carbon tetrachloride	MR	2	2009
Tetrachloroethylene	MR	2	2009
1,1,2-Trichloroethane	MR	2	2009
1,2,4-Trichlorobenzene	MR	2	2009
cis-1,2-Dichloroethylene	MR	2	2009
Styrene	MR	2	2009
Benzo(a)pyrene	MR	2	2009
2,3,7,8-TCDD	MR	2	2009
Dalapon	MR	2	2009
Pentachlorophenol	MR	2	2009
2,4,5-TP	MR	2	2009
Di(2-ethylhexyl) phthalate	MR	2	2009
BHC-GAMMA	MR	2	2009
Chlordane	MR	2	2009
Endrin	MR	2	2009
Heptachlor epoxide	MR	2	2009
Total Polychlorinated Biphenyls (PCB)	MR	2	2009
HEXACHLOROBENZENE	MR	2	2009
Diquat	MR	2	2009
Carbofuran	MR	2	2009
Lead and Copper Rule	MR	2	2024
Revised Total Coliform Rule	TT	2	2019
Gross Alpha, Excl. Radon and U	MR	2	1981

Redwood Terrace Mutual

Redwood Terrace Mutual standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Population served record for Redwood Terrace Mutual

Nationwide peers

Cross-state systems with comparable violation load