Regulatory Rate Filings	9 Months Ended
Sep. 30, 2018
Regulated Operations [Abstract]
Regulatory Rate Filings	Regulatory Rate Filings California Regulatory Affairs On January 4, 2018, San Jose Water Company filed General Rate Case Application No. 18-01-004 (“GRC”) with the CPUC requesting authority for an increase of revenue of $34,288, or 9.76%, in 2019, $14,232, or 3.70%, in 2020 and $20,582, or 5.17%, in 2021. Among other things, the application also includes requests to recover $20,725 from balancing and memorandum accounts, the establishment of a Water Revenue Adjustment Mechanism and Sales Reconciliation Mechanism (“WRAM/SRM”), and a shift to greater revenue collection in the service charge. On June 28, 2018, the CPUC issued an order in the case identifying the issues to be considered, including whether the proposed merger between SJW Group and Connecticut Water Service, Inc. will have any ratemaking impact on the customers of San Jose Water Company (see discussion on the proposed merger at Note 12). This consideration was subsequently removed from the GRC to be considered in an Order Instituting Investigation (“OII”) on the proposed merger issued on July 20, 2018, see below for further discussion. On August 10, 2018, San Jose Water Company and the Office of Ratepayer Advocates filed a joint motion for partial settlement (“Settlement”) of the GRC with the CPUC, resolving all issues in the GRC with the exception of authorization of a WRAM/SRM and the recovery of the balance in the Hydro Generation Research, Development and Demonstration Memorandum Account, such issues being subsequently contested in legal briefs. On October 16, 2018 the CPUC issued a Proposed Decision adopting the Settlement in part, without any impact on the proposed revenue requirement outlined in the Settlement, and delaying ruling on the contested issues in order to allow the Settlement rates to become effective January 1, 2019. Comments on the Proposed Decision are due on November 5, 2018. New rates resulting from the GRC, if approved, are expected to become effective January 1, 2019. The CPUC directed its Class A water utilities, including San Jose Water Company, to reflect the changes to the Internal Revenue Code resulting from the passage of the Tax Act in customer rates. On May 8, 2018, the CPUC directed San Jose Water Company to file an advice letter to implement a change in water rates to reflect the lower income tax rate provided by the Tax Act, effective July 1, 2018. On May 23, 2018, San Jose Water Company filed Advice Letter No. 522 in compliance with the CPUC’s directive. On June 7, 2018, San Jose Water Company filed Advice Letter No. 522A amending the rate change to reflect a reduction in revenue requirement for 2018 of $14,801 or 3.89%, with no impact on after tax income. This request became effective July 1, 2018. On June 13, 2018, San Jose Water Company filed Advice Letter No. 523 with the CPUC requesting authorization to implement surcharges to offset the increases to purchased potable water charges, the ground water extraction fee, and purchased recycled water charges implemented by the Santa Clara Valley Water District and South Bay Water Recycling effective July 1, 2018. The increases amount to a revenue increase of $13,732 or 3.75%. This request became effective July 1, 2018. San Jose Water Company filed Advice Letter No. 524 with the CPUC on July 26, 2018, requesting authorization to recover the 2017 capital additions related to the Montevina Water Treatment Plant Upgrade Project. The filing requested a revenue increase of $3,155 or 0.83% and became effective August 25, 2018. On July 20, 2018 the CPUC issued OII No. 18-07-007 concerning SJW Group’s merger with Connecticut Water Service, Inc. In its filing, the CPUC committed to a schedule that would complete its investigation in a time frame to allow the proposed merger to move forward by the end of 2018, if appropriate. At a required pre-hearing Conference on August 22, 2018, the CPUC confirmed its commitment to the schedule and a Scoping Memorandum was subsequently issued on September 7, 2018, which identified issues to be considered on whether the proposed merger is subject to CPUC approval and its likely impacts within California. On September 14, 2018, SJW Group and San Jose Water Company submitted joint comments in response to the issues identified above in accordance with the Scoping Memorandum’s adopted schedule, and reply comments were submitted on October 19, 2018. OII No. 18-07-007 is on track to meet the schedule for a commission decision in the matter in December of 2018. In January 2017, a San Jose Water Company customer inquired about the company’s billing practice as it related to the proration of service charges in billing cycles where a rate change occurred. After reviewing its existing practice as well as those of other Class A water utilities, San Jose Water Company determined that it was appropriate to modify its existing practice to prorate service charges similar to the manner in which it prorates quantity charges - that is by applying both the old and new rates to the portion of the billing cycle for which the rates were in effect. This change was implemented on January 30, 2017, and retroactively applied to January 1, 2017. Subsequently, on May 8, 2017, the CPUC’s Water Division notified San Jose Water Company that it had violated Public Utilities Code 532 and other CPUC Orders and directed the company to file an advice letter providing refunds for the period of January 1, 2014, through December 31, 2016. As directed, San Jose Water Company filed Advice Letter 510 on June 6, 2017, to propose customer refunds in the amount of $1,800 for the same period. On June 22, 2017, San Jose Water Company was served with Complaint 17-06-009 regarding its billing practice for service charge rate changes. On August 11, 2017, the Water Division rejected Advice Letter 510 in light of the CPUC’s investigation into San Jose Water Company’s past and present billing practice. The billing issue was made a part of San Jose Water Company’s current GRC proceeding. Testimony was provided by the Office of Ratepayer Advocates (now the Public Advocates Office or “Cal PA”) on May 23, 2018. On June 8, 2018, the company provided its rebuttal testimony. On August 10, 2018, San Jose Water Company and Cal PA submitted a partial settlement agreement on issues presented in the GRC. Both the company and Cal PA settled on the billing issue limiting the duration from which to calculate customer refunds from June 1, 2011 through December 31, 2016. Accordingly, San Jose Water Company has provided an additional reserve to cover the remaining period covered by the settlement. On September 14, 2018, the CPUC issued OII No. 18-09-003 to which San Jose Water Company was named as Respondent. The OII will determine whether the company unlawfully overcharged customers over a 30-year period by failing to pro-rate service charges when increases occurred during a billing period, and whether the company double-billed service charges during one billing period when allegedly switching from billing such charges in advance to billing in arrears. The OII resulted from a report by the CPUC’s Consumer Protection and Enforcement Division (“CPED”), dated August 16, 2018, recommending an investigation into San Jose Water Company’s billing practice. CPED calculated a refund obligation of approximately $2,061 for the years 2014 to 2016 that had been the subject of San Jose Water Company’s Advice Letter 510. CPED calculated a further refund obligation of approximately $1,990 for the years 1987 to 2013. CPED also asserted that the company double-billed its customers during a billing period when it allegedly converted from billing in advance to billing in arrears, assumed that such double-billing occurred in January 2011, and calculated a refund obligation of approximately $4,935. The OII notes these estimates and identifies the proper refund amount as an issue in the proceeding. The OII also identifies the CPUC’s authority to consider imposing penalties on San Jose Water Company in amounts ranging from five hundred dollars to fifty thousand dollars per offense, per day. San Jose Water Company continues to cooperate with the CPUC to resolve these issues. On October 15, 2018, San Jose Water Company filed a response to the OII with the CPUC, in which the company stated that it believes it would not be appropriate for the Commission to require refunds extending prior to June 2011, that no double billing has occurred and that no penalties should be imposed on the company. As a result, the company believes it is only probable that refunds agreed to in the partial settlement with Cal PA will be refunded to customers and has provided for this amount in the accompanying unaudited condensed consolidated financial statements. Texas Regulatory Affairs As required, CLWSC submitted on July 31, 2018 its Water Pass-Through Charge (“WPC”) true-up report to the Public Utilities Commission of Texas (“PUCT”) reflecting a change from $1.15 to $1.13 per thousand gallons. The WPC is the annual filing to change that component of CLWSC’s water rates for the changes in purchased water costs since the last annual true-up report. This change for 2018 became effective on water bills being prepared as of February 1, 2018. The PUCT directed CLWSC (as well as other Class A water utilities in Texas) to quantify all of the impacts of the passage of the Tax Act and make rate adjustments reflecting such impacts on a prospective basis. PUCT Order 47945-36 as amended by 47945-41 orders the water utilities to record a regulatory liability that reflects (1) the difference between the revenues collected under existing rates and the revenues that would have been collected had the existing rates been set using the recently approved federal income tax rates; and (2) the balance of excess accumulated deferred federal income taxes that now exists because of the decrease in the federal income tax rate from 35% to 21%. A rate proposal reflecting these tax changes was submitted for PUCT’s review on April 19, 2018. CLWSC subsequently amended its filing on April 30, 2018 to update the customer notice, and to replace estimates for April with recorded April 2018 information. This filing will return to the ratepayers the difference between the revenues collected under the existing rates and what water rates would have been using the 21% federal income tax rate now effective under the Tax Act. The accrued amounts for the period January 25, 2018 through April 30, 2018 were refunded along with the regular monthly Federal Tax Cut Credit (“FTCC”) on bills prepared during the month of June. The FTCC customer credit will continue to be reflected on customer bills every month until the implementation of new rates resulting from the next rate case. It is projected this credit will reduce water revenue by $1,023 in 2018 with no impact on after tax income. CLWSC’s Sale Transfer and Merger application (“STM”) to acquire the Deer Creek Ranch Water Co., LLC’s assets is still pending before PUCT. Notices to customers and surrounding water companies and municipalities were mailed in January 2018 and on April 3, 2018 and the PUCT filed 47888-12, Order No. 4, approving the transaction between CLWSC and the Deer Creek Ranch Water Co., LLC to proceed in closing. The acquisition subsequently closed on July 2, 2018. The required completed transaction report was filed with the PUCT on July 5, 2018, and the Joint Proposed Notice of Approval was filed with the PUCT on September 17, 2018. The final order transferring the Certificate of Convenience and Necessity, or the exclusive right to provide water utility service, from Deer Creek Ranch Water Co., LLC to CLWSC is expected to be received from the PUCT prior to December 31, 2018.

Regulatory Rate Filings

California Regulatory Affairs

On January 4, 2018, San Jose Water Company filed General Rate Case Application No. 18-01-004 (“GRC”) with the CPUC requesting authority for an increase of revenue of $34,288, or 9.76%, in 2019, $14,232, or 3.70%, in 2020 and $20,582, or 5.17%, in 2021. Among other things, the application also includes requests to recover $20,725 from balancing and memorandum accounts, the establishment of a Water Revenue Adjustment Mechanism and Sales Reconciliation Mechanism (“WRAM/SRM”), and a shift to greater revenue collection in the service charge. On June 28, 2018, the CPUC issued an order in the case identifying the issues to be considered, including whether the proposed merger between SJW Group and Connecticut Water Service, Inc. will have any ratemaking impact on the customers of San Jose Water Company (see discussion on the proposed merger at Note 12). This consideration was subsequently removed from the GRC to be considered in an Order Instituting Investigation (“OII”) on the proposed merger issued on July 20, 2018, see below for further discussion. On August 10, 2018, San Jose Water Company and the Office of Ratepayer Advocates filed a joint motion for partial settlement (“Settlement”) of the GRC with the CPUC, resolving all issues in the GRC with the exception of authorization of a WRAM/SRM and the recovery of the balance in the Hydro Generation Research, Development and Demonstration Memorandum Account, such issues being subsequently contested in legal briefs. On October 16, 2018 the CPUC issued a Proposed Decision adopting the Settlement in part, without any impact on the proposed revenue requirement outlined in the Settlement, and delaying ruling on the contested issues in order to allow the Settlement rates to become effective January 1, 2019. Comments on the Proposed Decision are due on November 5, 2018. New rates resulting from the GRC, if approved, are expected to become effective January 1, 2019.

The CPUC directed its Class A water utilities, including San Jose Water Company, to reflect the changes to the Internal Revenue Code resulting from the passage of the Tax Act in customer rates. On May 8, 2018, the CPUC directed San Jose Water Company to file an advice letter to implement a change in water rates to reflect the lower income tax rate provided by the Tax Act, effective July 1, 2018. On May 23, 2018, San Jose Water Company filed Advice Letter No. 522 in compliance with the CPUC’s directive. On June 7, 2018, San Jose Water Company filed Advice Letter No. 522A amending the rate change to reflect a reduction in revenue requirement for 2018 of $14,801 or 3.89%, with no impact on after tax income. This request became effective July 1, 2018.

On June 13, 2018, San Jose Water Company filed Advice Letter No. 523 with the CPUC requesting authorization to implement surcharges to offset the increases to purchased potable water charges, the ground water extraction fee, and purchased recycled water charges implemented by the Santa Clara Valley Water District and South Bay Water Recycling effective July 1, 2018. The increases amount to a revenue increase of $13,732 or 3.75%. This request became effective July 1, 2018.

San Jose Water Company filed Advice Letter No. 524 with the CPUC on July 26, 2018, requesting authorization to recover the 2017 capital additions related to the Montevina Water Treatment Plant Upgrade Project. The filing requested a revenue increase of $3,155 or 0.83% and became effective August 25, 2018.

On July 20, 2018 the CPUC issued OII No. 18-07-007 concerning SJW Group’s merger with Connecticut Water Service, Inc. In its filing, the CPUC committed to a schedule that would complete its investigation in a time frame to allow the proposed merger to move forward by the end of 2018, if appropriate. At a required pre-hearing Conference on August 22, 2018, the CPUC confirmed its commitment to the schedule and a Scoping Memorandum was subsequently issued on September 7, 2018, which identified issues to be considered on whether the proposed merger is subject to CPUC approval and its likely impacts within California. On September 14, 2018, SJW Group and San Jose Water Company submitted joint comments in response to the issues identified above in accordance with the Scoping Memorandum’s adopted schedule, and reply comments were submitted on October 19, 2018. OII No. 18-07-007 is on track to meet the schedule for a commission decision in the matter in December of 2018.

In January 2017, a San Jose Water Company customer inquired about the company’s billing practice as it related to the proration of service charges in billing cycles where a rate change occurred. After reviewing its existing practice as well as those of other Class A water utilities, San Jose Water Company determined that it was appropriate to modify its existing practice to prorate service charges similar to the manner in which it prorates quantity charges - that is by applying both the old and new rates to the portion of the billing cycle for which the rates were in effect. This change was implemented on January 30, 2017, and retroactively applied to January 1, 2017. Subsequently, on May 8, 2017, the CPUC’s Water Division notified San Jose Water Company that it had violated Public Utilities Code 532 and other CPUC Orders and directed the company to file an advice letter providing refunds for the period of January 1, 2014, through December 31, 2016. As directed, San Jose Water Company filed Advice Letter 510 on June 6, 2017, to propose customer refunds in the amount of $1,800 for the same period. On June 22, 2017, San Jose Water Company was served with Complaint 17-06-009 regarding its billing practice for service charge rate changes. On August 11, 2017, the Water Division rejected Advice Letter 510 in light of the CPUC’s investigation into San Jose Water Company’s past and present billing practice. The billing issue was made a part of San Jose Water Company’s current GRC proceeding. Testimony was provided by the Office of Ratepayer Advocates (now the Public Advocates Office or “Cal PA”) on May 23, 2018. On June 8, 2018, the company provided its rebuttal testimony. On August 10, 2018, San Jose Water Company and Cal PA submitted a partial settlement agreement on issues presented in the GRC. Both the company and Cal PA settled on the billing issue limiting the duration from which to calculate customer refunds from June 1, 2011 through December 31, 2016. Accordingly, San Jose Water Company has provided an additional reserve to cover the remaining period covered by the settlement.

On September 14, 2018, the CPUC issued OII No. 18-09-003 to which San Jose Water Company was named as Respondent. The OII will determine whether the company unlawfully overcharged customers over a 30-year period by failing to pro-rate service charges when increases occurred during a billing period, and whether the company double-billed service charges during one billing period when allegedly switching from billing such charges in advance to billing in arrears. The OII resulted from a report by the CPUC’s Consumer Protection and Enforcement Division (“CPED”), dated August 16, 2018, recommending an investigation into San Jose Water Company’s billing practice. CPED calculated a refund obligation of approximately $2,061 for the years 2014 to 2016 that had been the subject of San Jose Water Company’s Advice Letter 510. CPED calculated a further refund obligation of approximately $1,990 for the years 1987 to 2013. CPED also asserted that the company double-billed its customers during a billing period when it allegedly converted from billing in advance to billing in arrears, assumed that such double-billing occurred in January 2011, and calculated a refund obligation of approximately $4,935. The OII notes these estimates and identifies the proper refund amount as an issue in the proceeding. The OII also identifies the CPUC’s authority to consider imposing penalties on San Jose Water Company in amounts ranging from five hundred dollars to fifty thousand dollars per offense, per day. San Jose Water Company continues to cooperate with the CPUC to resolve these issues. On October 15, 2018, San Jose Water Company filed a response to the OII with the CPUC, in which the company stated that it believes it would not be appropriate for the Commission to require refunds extending prior to June 2011, that no double billing has occurred and that no penalties should be imposed on the company. As a result, the company believes it is only probable that refunds agreed to in the partial settlement with Cal PA will be refunded to customers and has provided for this amount in the accompanying unaudited condensed consolidated financial statements.

Texas Regulatory Affairs

As required, CLWSC submitted on July 31, 2018 its Water Pass-Through Charge (“WPC”) true-up report to the Public Utilities Commission of Texas (“PUCT”) reflecting a change from $1.15 to $1.13 per thousand gallons. The WPC is the annual filing to change that component of CLWSC’s water rates for the changes in purchased water costs since the last annual true-up report. This change for 2018 became effective on water bills being prepared as of February 1, 2018.

The PUCT directed CLWSC (as well as other Class A water utilities in Texas) to quantify all of the impacts of the passage of the Tax Act and make rate adjustments reflecting such impacts on a prospective basis. PUCT Order 47945-36 as amended by 47945-41 orders the water utilities to record a regulatory liability that reflects (1) the difference between the revenues collected under existing rates and the revenues that would have been collected had the existing rates been set using the recently approved federal income tax rates; and (2) the balance of excess accumulated deferred federal income taxes that now exists because of the decrease in the federal income tax rate from 35% to 21%. A rate proposal reflecting these tax changes was submitted for PUCT’s review on April 19, 2018.

CLWSC subsequently amended its filing on April 30, 2018 to update the customer notice, and to replace estimates for April with recorded April 2018 information. This filing will return to the ratepayers the difference between the revenues collected under the existing rates and what water rates would have been using the 21% federal income tax rate now effective under the Tax Act. The accrued amounts for the period January 25, 2018 through April 30, 2018 were refunded along with the regular monthly Federal Tax Cut Credit (“FTCC”) on bills prepared during the month of June. The FTCC customer credit will continue to be reflected on customer bills every month until the implementation of new rates resulting from the next rate case. It is projected this credit will reduce water revenue by $1,023 in 2018 with no impact on after tax income.

CLWSC’s Sale Transfer and Merger application (“STM”) to acquire the Deer Creek Ranch Water Co., LLC’s assets is still pending before PUCT. Notices to customers and surrounding water companies and municipalities were mailed in January 2018 and on April 3, 2018 and the PUCT filed 47888-12, Order No. 4, approving the transaction between CLWSC and the Deer Creek Ranch Water Co., LLC to proceed in closing. The acquisition subsequently closed on July 2, 2018. The required completed transaction report was filed with the PUCT on July 5, 2018, and the Joint Proposed Notice of Approval was filed with the PUCT on September 17, 2018. The final order transferring the Certificate of Convenience and Necessity, or the exclusive right to provide water utility service, from Deer Creek Ranch Water Co., LLC to CLWSC is expected to be received from the PUCT prior to December 31, 2018.