Public water system · CA5400728
ActiveGrier Mutual Water Company
At a glance
Grier Mutual Water Company (PWSID CA5400728) is an active community water system in Tulare County, California. It reports serving 98 people through 99 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 11 violations for this system; none is health-based, and the most recent began in October 2017.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
98
Service connections
99
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Grier Mutual Water Company compare with other water systems in Tulare County?
By EPA's size categories, Grier Mutual Water Company is a very small system (500 people or fewer). Tulare County has 274 active public water systems. Its population served is well below the county average of 1,700 people per system, and accounts for less than 0.1% of the 465,710 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active community water system reports serving 6,703 people, so Grier Mutual Water Company is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. California has 2,997 active community water systems, 40% of the state's 7,479 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,179 California systems (83%) list groundwater as their primary source.
Who owns and regulates Grier Mutual Water Company?
EPA lists Grier Mutual Water Company as privately owned. The CA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 184 of the 274 active systems in Tulare County (67%) are also privately owned.
Does Grier Mutual Water Company have drinking water violations?
EPA's records list 11 violations for this system; none is health-based, and the most recent began in October 2017. The violations listed here began between October 1980 and October 2017. By type: 6 public notice, recordkeeping or other and 5 monitoring and reporting. The contaminant or rule involved most often is Lead and Copper Rule (2 of them). EPA lists 8 as archived and 3 as resolved. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2017-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2006-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1993-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1983-09-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1983-04-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1983-03-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1983-02-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1982-12-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1982-10-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1981-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1980-10-30 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
All 11 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Grier Mutual Water Company: frequently asked questions
Who runs Grier Mutual Water Company?
Grier Mutual Water Company (PWSID CA5400728) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Grier Mutual Water Company serve?
Grier Mutual Water Company reports serving 98 people through 99 service connections in Tulare County, California.
Where does Grier Mutual Water Company get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Grier Mutual Water Company have any drinking water violations?
EPA's records list 11 violations for this system; none is health-based, and the most recent began in October 2017. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Grier Mutual Water Company's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 11 violations for this system; none is health-based, and the most recent began in October 2017. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Grier Mutual Water Company's water quality report?
As a community water system, Grier Mutual Water Company must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Tulare County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Cws - Visalia | Tulare | 148,496 | Community | Groundwater |
| Tulare, City of | Tulare | 72,241 | Community | Groundwater |
| Porterville, City of | Tulare | 63,487 | Community | Groundwater |
| Dinuba, City of | Tulare | 27,281 | Community | Groundwater |
| Lindsay, City of | Tulare | 12,659 | Community | Surface water |
| Exeter, City of | Tulare | 11,169 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Grier Mutual Water Company, PWSID CA5400728, California”, https://aquacensus.com/water-systems/california/grier-mutual-water-company-ca5400728 (data as of October 1, 2026).