Question 1

Is Rancho Tierra Blanca POA water safe to drink?

Accepted Answer

Rancho Tierra Blanca POA (PWS ID: AZ0410272) has 204 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 126 people using Groundwater sources.

Question 2

How many people does Rancho Tierra Blanca POA serve?

Accepted Answer

EPA SDWIS reports that Rancho Tierra Blanca POA serves 126 people (this public water system's service population, not the municipal population of Marana or any other city). It is a Private-owned system using Groundwater water sources with 45 service connections. The operator address is listed in Marana, Arizona.

Question 3

What type of violations does Rancho Tierra Blanca POA have?

Accepted Answer

Rancho Tierra Blanca POA has 204 total violations: 1 health-based violations (MCL exceedances or treatment failures), 159 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Rancho Tierra Blanca POA water?

Accepted Answer

No PFAS testing data is available for Rancho Tierra Blanca POA under the EPA's UCMR5 monitoring program.

Question 5

What water source does Rancho Tierra Blanca POA use?

Accepted Answer

Rancho Tierra Blanca POA uses Groundwater 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 Rancho Tierra Blanca POA's violation count compare nationally?

Accepted Answer

Rancho Tierra Blanca POA has 204 recorded EPA SDWIS violations, fewer than 14% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 86% of that cohort has fewer violations than Rancho Tierra Blanca POA. 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	49	2013
Consumer Confidence Rule	Other	34	2021
Revised Total Coliform Rule	MON	27	2018
Lead and Copper Rule	MR	5	2016
Nitrate	MR	4	2002
E. COLI	MR	2	2013
cis-1,2-Dichloroethylene	MR	2	2002
DICHLOROMETHANE	MR	2	2002
p-Dichlorobenzene	MR	2	2002
1,2-Dichloroethane	MR	2	2002
1,1,1-Trichloroethane	MR	2	2002
Carbon tetrachloride	MR	2	2002
1,2-Dichloropropane	MR	2	2002
Trichloroethylene	MR	2	2002
1,1,2-Trichloroethane	MR	2	2002
CHLOROBENZENE	MR	2	2002
Benzene	MR	2	2002
Toluene	MR	2	2002
Ethylbenzene	MR	2	2002
1,2,4-Trichlorobenzene	MR	2	2002
Xylenes, Total	MR	2	2002
Tetrachloroethylene	MR	2	2002
Styrene	MR	2	2002
1,1-Dichloroethylene	MR	2	2002
Gross Alpha, Excl. Radon and U	MR	2	1989
o-Dichlorobenzene	MR	2	2002
trans-1,2-Dichloroethylene	MR	2	2002
BHC-GAMMA	MR	1	1998
Dalapon	MR	1	1998
Diquat	MR	1	1998

Rancho Tierra Blanca POA

Rancho Tierra Blanca POA standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Health-based violations on Rancho Tierra Blanca POA

Nationwide peers

Cross-state systems with comparable violation load