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NOTE: Payments made after 7:00pm will not be considered paid until the next business day, late fees and disconnect fees will not be waived if incurred during this time frame.

AVISO: Pagos realizados después de las 7:00pm serán considerados hasta el día siguiente (de negocios), recargospor pago tardío o desconección no serán removidos si se incurrenen éste periodo de tiempo.

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Important Notice/Aviso Importante



ERHWSC is now hiring, please visit the Employment tab for details.

On September 23, 2019, at 6:00 a.m. East Rio Hondo Water Supply Corporation (PWS ID 0310096) and Arroyo City (PWS ID 0310031) will change our primary disinfectant from "Chloramines" to "Free Chlorine". The change in disinfectant is conducted as an annual distribution maintenance procedure in order to reduce nitrification, taste, and odor issues throughout our distribution system. It will take time after the change in disinfectants for the conversion to take place in the distribution system. We will be using free chlorine for a 30 day period. The 30 day period will end on the morning of October 24, 2019. After that time period ERHWSC will revert back to Chloramines for our disinfection process. During this conversion process, both to and from free chlorine, a stronger chlorine/bleach odor may be apparent in your drinking water, as these odors are a product of the breakdown of chloramine by free chlorine. All regulatory requirements will be adhered to during this process in regards to the level of chlorine in your drinking water. E.R.H.W.S.C. advises any customers with medical conditions affected by Free Chlorination to consult medical professionals in regards to any affects concerning consuming chlorinated drinking water. If you have any questions, please contact Amanda M. Ramos, Administrative Services Manager at (956)247-7817.

Para ver este mensaje en español oprima aqui.

**Click here to view more information regarding "Free Chlorine".


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To see in .pdf format the Texas Drought Monitor map for the month of April 2013, click on the link: April 2013 Drought Monitor.pdf


East Rio Hondo Water Supply Corporation
206 Industrial Parkway · P.O. Box 621 · Rio Hondo, Texas 78583
Phone (956)-748-3633 * Fax (956)-748-3179 *
"This Institution is an Equal Opportunity Employer and Provider"


March 15, 2013 

Dear Corporation Member: 

East Rio Hondo Water Supply Corporation (ERHWSC) is implementing Stage 2 of the Retail and Wholesale Drought Contingency and Emergency Water Demand Management Plans, which is detailed in Section H and I, respectively, of the ERHWSC Tariff. Stage 2 of the Plans was triggered by written notice from Cameron County Irrigation District Number Two (CCID2), ERHWSC's raw water delivery contractor, that they will deplete their allocation of irrigation water rights by May or June of this year. The Plans require Stage 2 restrictions when 60 to 90 day notice of this "pushwater" condition is provided. Pushwater is essentially the water lost in the irrigation district system between the Rio Grande River pump station and the point of diversion at ERHWSC's treatment facility. This water demand is normally met by the large volumes of irrigation water flowing through the canals and resacas. Without the irrigation water in the system, municipal suppliers must provide the entire quantity of pushwater.


Stage 2 of the Plan includes an increase in rate structure in an effort to encourage reduced usage. Research has consistently shown that financial impact is the most effective means to encourage the public to ration water. The Stage 2 base and gallonage rate structures are outlined below. The gallonage rate structure is stair-stepped to increase costs as water usage increases above normal requirements for domestic purposes. The monthly base rates and base usages will not change as those customers using lower quantities of water are not impacting ERHWSC's ability to maintain sufficient service. 



5/8"X3/4" 1.0 35.00 2000
1.0" 2.5 57.50 5000
1.5" 5.0 175.00 10,000
2" TURBINE 8.0 280.00 16,000
3" COMPOUND 16.0 560.00 32,000
4" COMPOUND 25.0 875.00 50,000

The gallonage charge shall be added at the following rates for usage above the base usage during any one (1) billing period.

Starting Value Category Maximum Cost $ per Thousand
  Base Usage Bast Rate
1 gal above Base 8,000 fal above Base $3.00
8,001 gal above Base 18,000 gal above Base $3.75
18,001 above Base 48,000 gal above Base $4.50
48,000 above Base Any greater usage $5.25

Please check your billing stub to determine which billing code applies to your account. Customers whose account number begins with a number 1, 2, 6, & 8 will have the Stage 2 rate structure begin applying to water usage on April 1st. Customers whose account number begins with 3, 4, 5, & 7 will have the Stage 2 rate structure apply to water usage starting April 15th. Stage 2 will be rescinded when all triggering criteria for Stage 2 have not existed for a period of 30 days. All billing cycles are a 30-day period.

 Stage 2 includes the following water use restrictions:

1. Irrigation of lawns and landscaped areas with hose-end sprinklers or automatic or manual irrigation systems shall be limited to the hours of 8:00 PM to 8:00 AM. Irrigation of landscaped areas is permitted anytime if it is by means of drip irrigation or a hand-held hose.

2. Washing of vehicles, motorbikes, boats, trailers, and airplanes is allowed when done with a bucket or a hand-held hose equipped with a positive shutoff nozzle.
3. Operation of any ornamental fountain or pond for aesthetic or scenic purposes is prohibited except where necessary to support aquatic life.
4. Non essential water uses should be eliminated.

The Plan also includes provisions for water allotments for livestock operations, emergency water shortage rationing, and a water rights surcharge. The water rights surcharge could apply to all ERHWSC customers if the pushwater required for CCID2's system losses becomes excessive.

If any ERHWSC member would like a copy of the Plan or water conservation literature or information, it may be obtained at the Main Office in Rio Hondo upon request or on our webpage at We hope you understand the need for these restrictions during this period of historical drought.

 Please contact us with any questions concerning this letter or your service at (956)-748-3633 or 1-888-748-4270. Esta información se puede obtener en español llamando al teléfono (956)-748-3633 o 1-888-748-4270.



Billie Joe Simpson


Dear Corporation Member:

On August 13, 2012, the East Rio Hondo Water Supply Corporation (ERHWSC) Board of Directors approved the following water rate structure. The new rates, as outlined below, will apply to all billings mailed after October 15, 2012. Please note that this is a conservation rate structure. Members that use larger amounts of water will pay more per thousand gallons as they use more of the system's capacity.

Effective November, 10 2010
Effective October 15, 2012
5/8"X3/4" 1.0 $34.00 $35.00 2,000
1.0" 2.5 $85.00 $87.00 5,000
1.5" 5.0 $170.00 $175.00 10,000
2" TURBINE 8.0  $272.00 $280.00   16,000 
 3" COMPOUND 16.0 $544.00 $560.00 $32,000 
4" COMPOUND 25.0 $85.00 $875.00 50,000

In addition to the minimum monthly rate noted in the table above, a gallonage charge shall be added at the following rates for usage above the base usage during any one (1) billing period. The gallonage charge is unchanged from previous rates.

1) $3.00 per 1,000 gallons for any gallonage between 1 and 8,000 gallons above base usage;
2) $3.50 per 1,000 gallons for any gallonage between 8,001 and 18,000 gallons above base usage;
3) $3.75 per 1,000 gallons for any gallonage between 18,001 and 48,000 gallons above base usage;
4) $4.25 per 1,000 gallons for any gallonage 48,001 gallons or more above base usage.

After serious consideration of the current economic difficulties being experienced by many of our members, the Board of Directors implemented this rate change to meet financial requirements for our capital improvement program. ERHWSC budgets are becoming largely influenced by increasing principle, interest, depreciation, and debt reserve requirements associated with loans for critical water plant and pipeline projects. Without these projects, many of our members on the far boundaries of our system would have extremely low water pressure during peak demands, and ERHWSC would be unable to physically support the growth of new members on our system. It is the goal of the Board of Directors to be prepared for future demands and provide the best water quality and surest supply of water possible to our existing members.

ERHWSC continues to strive to improve our service and water quality to our members, while minimizing expenses at every opportunity. We value your membership and want you to be aware that you and your fellow members' participation make our rural water system possible. Thank you for your continued membership. Please visit our website at to learn more about ERHWSC, or contact us with any questions or concerns.



Billie Joe Simpson


Dear Corporation Member:

On August 13, 2012, the East Rio Hondo Water Supply Corporation (ERHWSC) Board of Directors approved a new monthly rate (minimum) of $35.00 for wastewater service for a base usage of 2000 gallons. The current rate is $34.00. The gallonage charge remains unchanged at $3.00 per thousand gallons for usage above 2000 gallons, with a cap on residential customers at $30.00. The new rate will apply to all wastewater billings mailed out after October 15, 2012.

This increase was adopted after significant consideration by the Board of Directors' of the current economic difficulties that many of our members are facing. This increase is required as ERHWSC has continued to operate our wastewater budget at a loss since the wastewater system startup. We continue to strive to provide the best service possible at the lowest cost we can manage to our members, but this increase in rates is necessary to approach a point of breaking even. ERHWSC staff continues to pursue all options to increase our wastewater membership and help spread the costs of service.

We understand this increase is unwanted, but hope you understand the need for financial stability with the sanitary sewer system. We believe the past experiences of septic tank backups and sewer discharges to yards and road side ditches are a much less desirable option. Feel free to contact us with any questions or concerns.


Billie Joe Simpson




Pursuant to Chapter 13.2502 of the Texas Water Code, East Rio Hondo Water Supply Corporation hereby gives notice that any person who subdivides land by dividing any lot, tract, or parcel of land, within the service area of East Rio Hondo Water Supply Corporation, Certificate of Convenience and Necessity No. 11552, in Cameron County, into two or more lots or sites for the purpose of sale or development, whether immediate or future, including re-subdivision of land for which a plat has been filed and recorded or requests more than two water or sewer service connections on a single contiguous tract of land must comply with "Section F, Developer, Subdivision, and Non-Standard Service Requirements" (the "Subdivision Policy") contained in East Rio Hondo Water Supply Corporation's tariff.

East Rio Hondo Water Supply Corporation is not required to extend retail water or sewer utility service to a service applicant in a subdivision where the developer of the subdivision has failed to comply with the Subdivision Policy.

Applicable elements of the Subdivision include:

Evaluation by East Rio Hondo Water Supply Corporation of the impact a proposed subdivision
service extension will make on East Rio Hondo Water Supply Corporation's water/sewer service
system and payment of the costs for this evaluation;

Payment of reasonable costs or fees by the developer for providing water supply/sewer service

Payment of fees for reserving water supply/sewer capacity;

Forfeiture of reserved water supply/sewer service capacity for failure to pay applicable fees;

Payment of costs of any improvements to East Rio Hondo Water Supply Corporation's system
that are necessary to provide the water/sewer service;

Construction according to design approved by East Rio Hondo Water Supply Corporation and
dedication by the developer of water/sewer facilities within the subdivision following inspection.

East Rio Hondo Water Supply Corporation's tariff and a map showing East Rio Hondo Water Supply Corporation's service area may be reviewed at East Rio Hondo Water Supply Corporation's offices, at 206 Industrial Parkway, Rio Hondo, Texas 78583. The tariff/policy and service area map also are filed of record at the Texas Commision On Environmental Quality in Austin, Texas and may be reviewed by contacting the TCEQ, c/o Utility Rates and Services Section, Water Utilities Division, P.O. Box 13087, Austin, Texas 78711.


Texas Landowner's bill of rights, click on the link CONDEMNATION PROCEDURES.pdf


Click on the link to view the ERHWSC Bylaws.pdf


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