Saltwater Disposal Wells in Refugio County

Complete UIC injection & disposal well inventory from RRC permits, with reported H-10 volumes.

Active Wells

231

Permitted Capacity

2.1M bbl/d

Injected 12mo (thru 2025-06)

73.5M bbl

UIC Permits All Time

829

STATUS	LEASE / WELL	API	OPERATOR	TYPE	PERMITTED BBL/D	INJECTED 12MO	ZONE (FT)
Active	HEARD, FANNIE V. W., MRS. #98	42-391-31575	HILCORP ENGY CO	Injection	20,000	5.9M	4,387–4,729
Active	HEARD, CLEMENT #27	42-391-31689	HILCORP ENGY CO	Disposal	15,000	3.2M	3,580–4,050
Active	O'CONNOR, THOMAS,-C- #98	42-391-32634	HILCORP ENGY CO	Disposal	25,000	3.0M	3,585–3,930
Active	O'CONNOR, THOMAS -A- #33	42-391-01460	HILCORP ENGY CO	Injection	15,000	2.5M	4,400–4,850
Active	WILLIAMS, MAUDE ET AL "A" #D136	42-391-31798	HILCORP ENGY CO	Disposal	15,000	2.1M	3,130–4,050
Active	HEARD, FANNIE V. W. #33	42-391-32111	DORCHESTER OPERATING COMPANY LLC	Injection	20,000	2.0M	4,323–4,640
Active	HEARD, J. F. B. #26	42-391-31703	DORCHESTER OPERATING COMPANY LLC	Injection	10,000	2.0M	2,815–4,100
Active	OBRIEN, J. J., -A- #7	42-391-00780	GRETA OPER CO LLC	Injection	15,000	1.5M	4,350–4,470
Active	WILLIAMS, MAUDE, ETAL -A- #D124	42-391-31713	HILCORP ENGY CO	Disposal	10,000	1.5M	2,985–4,030
Active	LAMBERT, M. F. #139	42-391-30396	HILCORP ENGY CO	Disposal	20,000	1.5M	3,600–4,160
Active	OCONNOR, THOMAS, -C- #90	42-391-31897	HILCORP ENGY CO	Disposal	25,000	1.4M	3,530–4,070
Active	WILLIAMS, MAUDE, ETAL -A- #D 23	42-391-00212	HILCORP ENGY CO	Disposal	15,000	1.4M	3,030–3,970
Active	WILLIAMS, MAUDE ET AL -A- #D 25	42-391-00353	HILCORP ENGY CO	Disposal	12,000	1.4M	3,726–3,756
Active	OBRIEN, J. M. #9	42-391-00962	SOUTH TEXAS OPER CO	Injection	15,000	1.3M	3,475–4,395
Active	HEARD, CLEMENT #11	42-391-00848	HILCORP ENGY CO	Disposal	8,000	1.3M	2,830–3,870
Active	HEARD, FANNIE V.W. MRS. #62	42-391-00710	HILCORP ENGY CO	Disposal	20,000	1.1M	3,100–4,050
Active	WILLIAMS, MAUDE, ETAL -A- #D144	42-391-31792	HILCORP ENGY CO	Disposal	15,000	1.1M	2,840–3,970
Active	LAMBERT, M. F. #90	42-391-01438	HILCORP ENGY CO	Disposal	20,000	1.1M	3,600–4,100
Active	WILLIAMS, MAUDE, ETAL -A- #D 67	42-391-30276	HILCORP ENGY CO	Disposal	15,000	1.1M	3,600–4,000
Active	MAUDE WILLIAMS ET AL 'A' #D 21	42-391-00282	HILCORP ENGY CO	Disposal	15,000	1.1M	3,130–4,050
Active	WLP #28	42-391-32372	T-C OIL CO, LLC	Injection	5,000	1.0M	4,533–4,579
Active	O'CONNOR, THOMAS -C- #85	42-391-31613	HILCORP ENGY CO	Injection	15,000	1.0M	5,600–6,120
Active	LAMBERT, M. F. #108	42-391-01397	HILCORP ENGY CO	Disposal	20,000	921,893	3,600–4,025
Active	O'CONNOR, DENNIS ET AL -N- #N 14	42-391-31939	T-C OIL CO, LLC	Disposal	5,000	918,190	3,740–4,740
Active	LAMBERT, M.F. #69	42-391-01325	HILCORP ENGY CO	Disposal	10,000	900,095	3,670–4,130
Active	TOM OCONNOR (5800 SD) FLD. UNIT #3115Q	42-391-32005	HILCORP ENGY CO	Injection	5,000	822,898	5,700–5,800
Active	TOM OCONNOR (5800 SD) FLD. UNIT #Q404	42-391-00666	HILCORP ENGY CO	Injection	10,000	813,038	5,819–5,862
Active	SCHIRMER, HENRY #1	42-391-03609	BENT WING ENERGY, LLC	Disposal	5,000	794,549	3,552–3,938
Active	WILLIAMS, MAUDE, ETAL -A- #D 22	42-391-00330	HILCORP ENGY CO	Disposal	15,000	747,687	2,860–3,960
Active	O'CONNOR #74	42-391-32019	T-C OIL CO, LLC	Disposal	7,500	742,794	4,530–4,748
Active	TOM OCONNOR (5800 SD) FLD. UNIT #P145	42-391-31310	HILCORP ENGY CO	Disposal	20,000	712,319	3,000–4,075
Active	WLP #32	42-391-32464	T-C OIL CO, LLC	Injection	5,000	712,265	4,532–4,627
Active	OBRIEN, J. M. #302	42-391-01027	DORCHESTER OPERATING COMPANY LLC	Injection	9,000	696,976	3,100–3,200
Active	THOMAS O'CONNOR "C" #3G	42-391-01140	HILCORP ENGY CO	Disposal	10,000	694,342	3,000–4,050
Active	WILLIAMS, MAUDE ET AL 'A' #D 20	42-391-00211	HILCORP ENGY CO	Disposal	15,000	654,236	3,000–4,060
Active	HEARD, CLEMENT #17	42-391-30062	HILCORP ENGY CO	Injection	7,000	647,994	3,157–3,233
Active	TOM OCONNOR (5800 SD) FLD. UNIT #C104	42-391-01582	HILCORP ENGY CO	Injection	4,000	626,023	5,780–5,820
Active	TOM O'CONNOR(5600 FOOT SAND)UNIT #W524B	42-391-31588	HILCORP ENGY CO	Injection	37,498	609,205	4,380–5,600
Active	TOM O'CONNOR(5600 FOOT SAND)UNIT #3111WB	42-391-31920	HILCORP ENGY CO	Injection	10,000	603,733	5,175–5,605
Active	HEARD, FANNIE V. W., MRS. #49	42-391-00571	HILCORP ENGY CO	Disposal	10,000	600,504	3,620–3,716
Active	WLP #31	42-391-32465	T-C OIL CO, LLC	Injection	5,000	597,084	4,536–4,631
Active	TOM O'CONNOR (5730 FT. SD.) UNIT #A 46	42-391-00476	HILCORP ENGY CO	Injection	10,000	554,081	5,800–5,860
Active	WILLIAMS, MAUDE, ETAL -A- #D133	42-391-31781	HILCORP ENGY CO	Disposal	7,500	537,838	3,770–3,800
Active	TOM O'CONNOR (4150 FT. SD.) UNIT #W002GA	42-391-01531	HILCORP ENGY CO	Injection	5,000	524,668	4,050–4,200
Active	O'CONNOR, THOMAS "A" #103	42-391-01559	HILCORP ENGY CO	Injection	10,000	513,594	5,835–5,848
Active	T-C OIL CO. - O'CONNOR #87	42-391-32442	T-C OIL CO, LLC	Injection	7,200	513,097	4,453–4,490
Active	HEARD, J.F.B. #16	42-391-00875	DORCHESTER OPERATING COMPANY LLC	Injection	10,000	511,928	3,100–3,190
Active	OCONNOR, DENNIS, ET AL -N- #5	42-391-03770	T-C OIL CO, LLC	Injection	5,000	495,317	3,430–3,790
Active	BUCK, I. G. W. #4 T	42-391-03558	BENT WING ENERGY, LLC	Disposal	5,000	494,325	3,650–4,060
Active	REFUGIO SWD #2	42-391-33086	BES, ENVIRONMENTAL SERVICES,INC	Disposal	25,000	460,701	4,200–4,700
Active	TOM O'CONNOR(5600 FOOT SAND)UNIT #3126WB	42-391-33091	HILCORP ENGY CO	Disposal	10,000	456,766	5,500–5,660
Active	WILLIAMS, MAUDE ET AL -C- #8	42-391-32944	HILCORP ENGY CO	Injection	10,000	445,489	5,880–5,940
Active	RIVER RANCH -A-/WILLIAMS STATE U #5	42-391-32908	T-C OIL CO, LLC	Disposal	6,000	443,853	2,600–2,990
Active	O'CONNOR, THOMAS -C- #39	42-391-01567	HILCORP ENGY CO	Injection	10,000	438,670	5,719–5,732
Active	WILLIAMS, MAUDE ET AL "A" #D140	42-391-31806	HILCORP ENGY CO	Disposal	15,000	424,971	2,820–4,020
Active	TOM O'CONNOR(5600 FOOT SAND)UNIT #3107WB	42-391-31849	HILCORP ENGY CO	Injection	10,000	417,743	5,500–5,570
Active	TOM O'CONNOR(5600 FOOT SAND)UNIT #W101B	42-391-00736	HILCORP ENGY CO	Injection	10,000	411,934	5,150–5,630
Active	WILLIAMS, MAUDE, ETAL -A- #D132	42-391-31780	HILCORP ENGY CO	Disposal	15,000	405,055	3,000–4,050
Active	TOM OCONNOR (5800 SD) FLD. UNIT #H117	42-391-31378	HILCORP ENGY CO	Injection	6,000	390,158	5,760–5,810
Active	BRAMAN -F- #1	42-391-33239	T-C OIL CO, LLC	Disposal	3,000	388,780	6,300–7,500
Active	T-C OIL CO. - O'CONNOR #88	42-391-32441	T-C OIL CO, LLC	Injection	7,200	386,459	4,456–4,493
Active	TOM OCONNOR (5800 SD) FLD. UNIT #Q283	42-391-31611	HILCORP ENGY CO	Injection	10,000	386,006	5,600–5,814
Active	LAMBERT, M. F. #43D	42-391-01381	HILCORP ENGY CO	Injection	15,000	386,004	2,250–4,120
Active	TOM O'CONNOR (4150 FT. SD.) UNIT #O111WA	42-391-01483	HILCORP ENGY CO	Injection	3,000	381,752	4,140–4,170
Active	T-C OIL CO. - O'CONNOR #43	42-391-00385	T-C OIL CO, LLC	Injection	7,200	375,345	4,455–4,494
Active	TOM OCONNOR (5800 SD) FLD. UNIT #C103	42-391-01581	HILCORP ENGY CO	Injection	7,500	367,292	5,784–5,799
Active	WILLIAMS, MAUDE ET AL -A- #D 70	42-391-30281	HILCORP ENGY CO	Disposal	5,000	365,539	3,040–4,000
Active	WLP #30	42-391-32466	T-C OIL CO, LLC	Injection	5,000	361,437	4,539–4,634
Active	TOM OCONNOR (5800 SD) FLD. UNIT #Q905	42-391-80642	HILCORP ENGY CO	Injection	10,000	359,705	5,860–5,910
Active	T-C OIL CO. - O'CONNOR #86	42-391-32443	T-C OIL CO, LLC	Disposal	5,000	351,360	3,790–4,060
Active	ROOKE, P.H. #66R	42-391-33275	SAN ISIDRO DEV CO, L. C	Disposal	10,000	350,054	3,970–4,420
Active	LAMBERT, M. F. #73	42-391-01349	HILCORP ENGY CO	Injection	20,000	349,310	4,384–4,458
Active	OBRIEN,J.M.,-A- EAST 101 AC. 6 #8	42-391-00958	DEWBRE PETRO CORP	Injection	1,200	330,231	4,300–4,400
Active	RIVER RANCH -B- STATE UNIT #5	42-391-32964	T-C OIL CO, LLC	Disposal	6,000	313,662	2,600–3,020
Active	HEARD, J. F. B. #19	42-391-00878	DORCHESTER OPERATING COMPANY LLC	Injection	9,000	277,526	3,100–3,195
Active	WLP #22	42-391-32354	T-C OIL CO, LLC	Injection	5,000	275,624	4,529–4,570
Active	T-C OIL CO. - O'CONNOR #17	42-391-00366	T-C OIL CO, LLC	Injection	5,000	270,445	4,455–4,500
Active	T-C OIL CO.-OCONNOR #21	42-391-00373	T-C OIL CO, LLC	Disposal	6,000	265,700	3,705–4,008
Active	TOM OCONNOR (5800 SD) FLD. UNIT #Q315	42-391-00684	HILCORP ENGY CO	Injection	5,000	257,041	5,700–5,760
Active	TOM O'CONNOR (5730 FT. SD.) UNIT #A 19	42-391-00427	HILCORP ENGY CO	Injection	6,000	247,154	5,659–5,676
Active	TOM O'CONNOR(5600 FOOT SAND)UNIT #3117WB	42-391-32672	HILCORP ENGY CO	Injection	8,000	241,351	5,550–5,597
Active	DENNIS O'CONNOR ET AL -N- #N 6	42-391-03767	T-C OIL CO, LLC	Disposal	3,000	237,433	3,178–3,402
Active	OCONNOR #38	42-391-00255	T-C OIL CO, LLC	Disposal	4,000	227,056	3,848–4,118
Active	TOM OCONNOR (5800 SD) FLD. UNIT #N110	42-391-01737	HILCORP ENGY CO	Injection	8,000	226,538	5,600–5,800
Active	TOM O'CONNOR(5600 FOOT SAND)UNIT #W907B	42-391-00514	HILCORP ENGY CO	Injection	10,000	207,730	5,634–5,670
Active	WLP #16	42-391-32300	T-C OIL CO, LLC	Injection	5,000	201,471	4,520–4,575
Active	T-C OIL CO.- O'CONNOR #55	42-391-30266	T-C OIL CO, LLC	Disposal	6,000	186,890	3,766–4,055
Active	OCONNOR, DENNIS, ETAL -L- #L 77	42-391-32535	T-C OIL CO, LLC	Injection	10,000	153,382	4,526–4,610
Active	OCONNOR, DENNIS ET AL -L- #L 33	42-391-00349	T-C OIL CO, LLC	Disposal	3,000	152,234	3,742–4,040
Active	THOMAS O'CONNOR 'A' #71	42-391-01526	HILCORP ENGY CO	Injection	5,000	149,898	5,450–5,850
Active	WLP #29	42-391-32373	T-C OIL CO, LLC	Injection	5,000	142,320	4,513–4,549
Active	OCONNOR, DENNIS, ETAL -L- #L 48	42-391-30513	T-C OIL CO, LLC	Disposal	3,500	140,357	3,400–3,600
Active	TOM OCONNOR (5800 SD) FLD. UNIT #Q512	42-391-00849	HILCORP ENGY CO	Injection	6,000	132,596	5,863–5,897
Active	TOM OCONNOR (5800 SD) FLD. UNIT #H132	42-391-31768	HILCORP ENGY CO	Injection	10,000	117,494	5,747–5,790
Active	LAMBERT, M. F. #65	42-391-01347	HILCORP ENGY CO	Injection	20,000	110,023	4,380–4,454
Active	TOM OCONNOR (5800) FIELD UNIT #Q842W	42-391-00450	HILCORP ENGY CO	Injection	5,000	107,395	1,795–1,838
Active	WLP #27	42-391-32355	T-C OIL CO, LLC	Injection	5,000	90,486	4,510–4,560
Active	OCONNOR, DENNIS, ETAL -L- #L 87	42-391-32598	T-C OIL CO, LLC	Injection	10,000	89,005	3,730–4,030
Active	ROCHE "A" #9	42-391-32369	FINALY RES LLC	Injection	3,000	85,122	5,050–6,050
Active	HEARD, FANNIE V. W. MRS. #112	42-391-31401	HILCORP ENGY CO	Disposal	30,000	81,079	3,600–4,110

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Source: RRC UIC well master and H-10 injection filings. H-10s are annual filings on staggered anniversaries — injected volumes shown through 2025-06, the newest month with complete reporting; recent months are never estimated.